SentinelX NFC

(34 reviews) Write a Review

Product Overview

Our newest device.

The SentinelX NFC

The newest addition to the SentinelX family, the SentinelX NFC is a card that uses Near-field Communication technology and helps us verify your location is authentic.

Earn 12x rewards on a Basic COIN Plan, and a 10% boost on any COIN Premium Plan! The SentinelX NFC requires no battery, and simply needs to be scanned by your phone for a temporary rewards boost.

The SentinelX NFC is a convenient credit card shape, so you can keep it close by in a wallet or laptop case.

SentinelX Sharing

Register a SentinelX NFC to your COIN Account, and give it to a friend. When they Geomine with the NFC boost, you'll get 10% of their rewards! You can even combo with Referral Rewards to earn a maximum of 20% from their account.

NFC Compatibility

Note: Requires NFC Compatibility. Not compatible with iPhone 5, 6, 6+ or SE (2016), and some older Android devices. Please check compatibility here: 


  • Near-Field Communication Technology
  • Waterproof
  • Additional Rewards on Every COIN Plan
  • XYO Foundation Approved Product
  • Assign a Referral Link to the device for easy referrals
  • SentinelX Sharing on any COIN Account level (including basic!)

Product Videos


(34 reviews) Write a Review

34 Reviews Hide Reviews Show Reviews

  • 5
    This is slick

    Posted by Geoff Friesen on 1st Apr 2022

    Thank you COIN!! You simply gotta try this app. If you spend a bit of your hard earned cash, you can earn literally 36 times more! What you waiting for?

  • 5
    Great device

    Posted by Mike Robinson on 22nd Mar 2022

    Easy to use and gets you more COIN. i really appreciate that they thought through these details

  • 5
    sentinelX NFC

    Posted by Takeo Muraoka on 12th Jul 2021

    Love it no more battery great product

  • 5
    Does what it says it does.

    Posted by R.B. P. on 29th May 2021

    Compact and convenient

  • 5
    SentinelIX NFC

    Posted by SSnide on 17th May 2021

    This is an easy and portable way to get the mining boost you need.

  • 5
    Sentinel NFC

    Posted by Mark on 5th May 2021

    Really easy to use. I keep it in my wallet to top up the app when on the go.

  • 4
    I'm looking forward to using my new device super excited

    Posted by Will on 4th May 2021

    Looks like a simple easy to use device

  • 5
    Dispositivo Muy Recomendado

    Posted by Manu Martin on 12th Apr 2021

    Hola soy un usuario de España, yo lo he comprado desde el principio y es excelente. Te genera muchas más recompensas que sin él, incluso con cuentas básicas. Os lo recomiendo, simplemente pasándolo por detrás del smartphone se activa automáticamente, tienes que pasarlo cada ciertas horas.

  • 5
    Best option

    Posted by wskm on 7th Apr 2021

    No battery for life. You have to scan the card from time to time.

  • 5
    Good for earn all time hight

    Posted by AtlasXI on 5th Apr 2021

    Easy to talk in pocket. Strong and not wet

  • 3

    Posted by Eduardo on 2nd Apr 2021


  • 5
    NFC Sentinel

    Posted by Luke Bellamy on 1st Apr 2021

    The sentinelX is great for me, as it fits in my phone case flip panel, so I do not even need to take the card out to re scan it every 4 hours. It would be nice if you could somehow extend the time to 8 hours for overnight, maybe by doing an in app task. Glad I got it on a free offer/