How to block apps with an NFC tag on Android
Enrol a cheap NFC tag as your unlock: blocked apps only open when you physically tap the tag. Stick it somewhere inconvenient and the friction is real — no camera, no code to memorise, just a tap you have to walk to.
Free. Android. No account needed.
What you need
- •An Android phone with NFC. Most phones above the entry tier have it. If yours doesn’t, the QR unlock does the same job.
- •One NTAG-compatible tag. Stickers or cards, sold in packs of ten for the price of a coffee. Any of them works — you are using it as an identifier, not storing anything on it.
- •Somewhere to put it that is genuinely annoying to reach. This is the part that actually matters.
NFC unlock is a Pro feature. The free tier uses a reusable QR code, which gives you the same friction with the camera instead of the radio.
Enrolling your own tag
- 1. Turn on NFC in Android settings if it isn’t already.
- 2. Open MassBlocker and choose NFC as the unlock method for your lock.
- 3. Hold the tag to the back of the phone when prompted. The app records that specific tag as the one that unlocks.
- 4. Stick it where you decided. Peel the backing, put it on the surface, and leave it there.
- 5. Test it once before you rely on it, so you know where the phone’s NFC antenna actually is — usually the upper half of the back panel.
Where to place it for real friction
The tag is not the mechanism. The distance is. Placing it on your desk gives you a very tidy version of no blocker at all.
Another room
The kitchen, if you work in the bedroom. Far enough that going there is a decision.
Inside or behind something
On the back of a cupboard door, under a shelf. Out of sight means it stops prompting you.
Somewhere you'd have to stand up and dress for
A balcony, a stairwell, the front door. Strong, and the one people quietly move after a week — which tells you it was working.
One tag, one place. Moving it around undermines the habit you are building, which is that unlocking has a fixed and slightly irritating cost.
Why NFC beats a timer
A timer asks you to wait. A tag asks you to move. Those are not the same demand, and the second one is much harder to satisfy without noticing you are doing it.
A timer also has to be enforced by the same phone you are trying to put down, which is why every screen-time tool ends up with an extend button. The tag sits outside that argument entirely. There is nothing on the screen to negotiate with, because the answer is on the wall in the other room.
The cooldown still runs on top: even after you tap the tag, access opens after the wait rather than immediately. The tag handles convenience, the cooldown handles impulse.
The app in this guide
NFC unlock is one of several ways MassBlocker can end a locked session — alongside a QR scan, a 3-word code, and staying on the charger.
Related guides
- How to block apps on Android — the whole setup, and how the unlock methods compare
- Brick-style friction without the hardware — the same idea, minus a device to buy
- Dopamine detox on Android — what to block first, and making it last past day two
Questions
What tags are compatible?
Ordinary NTAG-family stickers and cards — the cheap ones sold in packs online. Any tag your phone can read will do; the tag only has to be identifiable, so capacity does not matter.
Can someone bypass it with another tag?
No. You enrol one specific tag and that is the one the unlock accepts. A different tag, even an identical-looking one from the same pack, is not the tag you enrolled.
Does my phone need NFC always on?
It needs NFC on at the moment you tap. Leaving it on is the practical choice — modern phones use almost nothing keeping the radio idle, and having to enable it first adds a step you will get tired of.
What if my phone doesn't have NFC?
Use the QR unlock instead. It works on every Android phone with a camera and gives you the same walk-across-the-room friction — the tag is a convenience, not a requirement.
Can I use a tag and a QR code together?
You choose the unlock method for the setup rather than stacking them. Many people keep a printed QR as the backup for the day the tag goes missing.