<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-03-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001837014</issuerCik>
        <issuerName>SmartRent, Inc.</issuerName>
        <issuerTradingSymbol>SMRT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001856330</rptOwnerCik>
            <rptOwnerName>RETV GP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001714397</rptOwnerCik>
            <rptOwnerName>Real Estate Technology Ventures, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001751501</rptOwnerCik>
            <rptOwnerName>Real Estate Technology Ventures Associates, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001753629</rptOwnerCik>
            <rptOwnerName>Real Estate Technology Ventures-A, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001777256</rptOwnerCik>
            <rptOwnerName>RET Ventures SPV I, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001856325</rptOwnerCik>
            <rptOwnerName>RETV GP II, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001801595</rptOwnerCik>
            <rptOwnerName>Real Estate Technology Ventures II, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001856320</rptOwnerCik>
            <rptOwnerName>Real Estate Technology Ventures Associates II, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 HEBER AVE, SUITE 304</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001676868</rptOwnerCik>
            <rptOwnerName>Yip Christopher J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O REAL ESTATE TECHNOLOGY VENTURES</rptOwnerStreet1>
            <rptOwnerStreet2>136 HEBER AVE, SUITE 304</rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001915632</rptOwnerCik>
            <rptOwnerName>Helm John Hanson</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O REAL ESTATE TECHNOLOGY VENTURES</rptOwnerStreet1>
            <rptOwnerStreet2>136 HEBER AVE, SUITE 304</rptOwnerStreet2>
            <rptOwnerCity>PARK CITY</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84060</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2022-03-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>X</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>937018</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.002</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5716921</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By RET Ventures SPV I, L.P.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25610456</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Real Estate Technology Ventures, L.P.</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>447221</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Real Estate Technology Ventures Associates, L.P.</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5886681</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Real Estate Technology Ventures-A, L.P.</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>389319</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Real Estate Technology Ventures II, L.P.</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9066</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Real Estate Technology Ventures Associates II, L.P.</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>32981</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F8"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14269</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F9"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.002</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-03-10</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>X</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>937018</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F10"/>
            </exerciseDate>
            <expirationDate>
                <value>2030-04-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>937018</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By RET Ventures SPV I, L.P.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares are held directly by RET Ventures SPV I, L.P. (&quot;RET SPV I&quot;). RETV GP, LLC (&quot;RET GP I&quot;) is the general partner of RET SPV I and may be deemed to beneficially own the shares held by RET SPV I. John Helm is the Managing Director of RET GP I, and may be deemed to share voting and investment power over the shares held by RET SPV I. Each of RET GP I and Mr. Helm disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.</footnote>
        <footnote id="F2">Shares are held directly by Real Estate Technology Ventures, L.P. (&quot;RET Fund I&quot;). RET GP I is the general partner of RET Fund I and may be deemed to beneficially own the shares held by RET Fund I. John Helm is the Managing Director of RET GP I, and may be deemed to share voting and investment power over the shares held by RET Fund I. Each of RET GP I and Mr. Helm disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.</footnote>
        <footnote id="F3">Shares are held directly by Real Estate Technology Ventures Associates, L.P. (&quot;RET Associates I&quot;). RET GP I is the general partner of RET Associates I and may be deemed to beneficially own the shares held by RET Associates I. John Helm  is the Managing Director of RET GP I, and may be deemed to share voting and investment power over the shares held by RET Associates I. Each of RET GP I and Mr. Helm disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.</footnote>
        <footnote id="F4">Shares are held directly by Real Estate Technology Ventures-A, L.P. (&quot;RET Fund I-A&quot;). RET GP I is the general partner of RET Fund I-A and may be deemed to beneficially own the shares held by RET Fund I-A. John Helm is the Managing Director of RET GP I, and may be deemed to share voting and investment power over the shares held by RET Fund I-A. Each of RET GP I and Mr. Helm disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.</footnote>
        <footnote id="F5">Shares are held directly by Real Estate Technology Ventures II, L.P. (&quot;RET Fund II&quot;). RETV GP II, LLC (&quot;RET GP II&quot;) is the general partner of RET Fund II and may be deemed to beneficially own the shares held by RET Fund II. John Helm and Christopher Yip are Managing Directors of RET GP II, and may be deemed to share voting and investment power over the shares held by RET Fund II. Each of RET GP II and Messrs. Helm and Yip disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.</footnote>
        <footnote id="F6">Shares are held directly by Real Estate Technology Ventures Associates II, L.P. (&quot;RET Associates II&quot;). RETV GP II is the general partner of RET Associates II and may be deemed to beneficially own the shares held by RET Associates II. John Helm and Christopher Yip are Managing Directors of RET GP II, and may be deemed to share voting and investment power over the shares held by RET Associates II. Each of RET GP II and Messrs. Helm and Yip disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein.</footnote>
        <footnote id="F7">The shares held by the Reporting Person reported herein reflect the receipt of shares pursuant to pro rata distributions in kind, effected by each of RET GP I and RET GP II to its members for no additional consideration, including the Reporting Person. The receipt of such shares by the Reporting Person constituted a change in form of ownership from indirect to direct, which was exempt from reporting pursuant to Rule 16a-13.</footnote>
        <footnote id="F8">Shares are held directly by John Helm</footnote>
        <footnote id="F9">Shares are held directly by Christopher Yip</footnote>
        <footnote id="F10">Immediately exercisable.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>RETV GP, LLC, By /s/ John Helm, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Real Estate Technology Ventures, L.P., By: RETV GP, LLC, its general partner, By /s/ John Helm, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Real Estate Technology Ventures Associates, L.P., By: RETV GP, LLC, its general partner, By /s/ John Helm, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Real Estate Technology Ventures-A, L.P., By: RETV GP, LLC, its general partner, By /s/ John Helm, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>RET Ventures SPV I, L.P., By: RETV GP, LLC, its general partner, By /s/ John Helm, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>RETV GP II, LLC, By /s/ Christopher Yip, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Real Estate Technology Ventures II, L.P., By: RETV GP II, LLC, its general partner, By /s/ Christopher Yip, Managing Director 02/25/2022 /s/ Christopher Yip</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Real Estate Technology Ventures Associates II, L.P., By: RETV GP II, LLC, its general partner, By /s/ Christopher Yip, Managing Director</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Christopher Yip</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ John Helm</signatureName>
        <signatureDate>2022-03-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
