HomeFor students
The library only works if the phone stays in the bag.
To revise without your phone winning, decide what is blocked before you sit down, lock it with one free tap, and leave the Spark key somewhere you would have to stand up and walk to — a roommate, a locker, the next room. The decision gets made once, by the version of you that is not yet four hours in.
Willpower fails at exactly the wrong moment
Nobody loses an evening at the start of a session. You lose it at the point the material stops making sense — the derivation that will not come out, the case law that refuses to stay in your head, the paper you have already failed twice. That is the moment your hand reaches for the phone, and it is not really about the phone. It is about wanting to be somewhere other than the difficult bit.
Which means the plan cannot be “try harder at 11pm”. Anything you can undo in the four seconds it takes to feel stuck will get undone exactly then. The only thing that survives is a decision made earlier, by a version of you who was thinking clearly, with a cost attached that your tired self cannot pay from the chair.
That is the whole mechanism. Locking is free, instant and works with Bluetooth switched off, so there is never a reason to hesitate before starting a session. Unlocking needs the key physically within radio range of your phone, answering a fresh random challenge — so the distance between you and the key is the entire product. There is published evidence that a phone’s mere presence occupies attention even when it is face-down and switched off; the studies are on the research page, and they are other people’s data, not ours.
What to block during a study block
Match the block to a real session — fifty minutes, ninety minutes — not to the whole day. Blocking 9am to 9pm sounds disciplined and lasts about two days.
| What | Verdict | Why |
|---|---|---|
| Short-form video | Block first | The format with no natural end. A two-minute break on a feed that never finishes is the single most reliable way to lose an evening. If you only block one thing, block this. |
| Social feeds | Block | Not because scrolling is a moral failure, but because the pull is strongest exactly when the material gets hard — and that is the moment the session has to survive. |
| The exam group chat | Block | The hardest one to give up and the one that costs most. Comparing progress at midnight is reassurance-seeking wearing a study-shaped label; it is not revision and it does not calm anybody down. |
| Notes, PDFs, past papers, calculator | Keep | A mode you cannot revise inside is a mode you will switch off by Wednesday. Keep the tools the work genuinely needs and block everything around them. |
| Calls, Maps and your alarm | Never blockable | A product rule, not a setting. A phone has to stay a phone in an emergency, so no mode can take these away — which is what makes it safe to block everything else properly. |
People build a perfect study mode and then leave the phone on the desk because it is running the pomodoro — at which point the phone is on the desk, which was the original problem. A cheap kitchen timer, a wristwatch or the clock on the wall fixes it, and it is the one purchase that gets the phone off the desk without an argument.
Out of range, not just out of reach
This is the part people get wrong, and it is a question about radio range rather than resolve. If your phone can still hear the key from where you are sitting, you have not actually left it anywhere.
Another person beats another room, because retrieving it costs a small social moment as well as a walk. If they are out, the far end of the corridor or a locker will do — the test is whether your phone can still hear it from your desk.
Unlocking asks your phone to find the key over Bluetooth and get a fresh answer back from it, so a wall and a room's distance is the placement that works. The shelf behind you is not another room as far as a radio is concerned.
Reading rooms that make you leave your bag at the counter are doing half the job already. Put the key in the bag rather than your pocket and the block holds for the whole sitting.
When the timetable is measured in months
A distracted working day costs you a working day. A distracted preparation compounds — and if you are sitting UPSC, JEE, NEET, CAT, GATE or CA, the preparation is not a week of cramming but a cycle you have to survive with your attention intact from one end to the other. Boards are the same shape at smaller scale.
Two things follow from that length. The first is that any system relying on how motivated you feel is going to meet a month where you are not motivated, so the system has to work on the bad days or it does not count. The second is that the group chat gets worse, not better, as the date approaches — a year of comparing progress at midnight is a year of a stress loop that has nothing to do with the syllabus.
The honest limit: nothing here makes you revise. A key raises the cost of the escape you take when the material gets hard, and it removes the argument you have with yourself every hour about whether to check something. Everything past that is the same work it always was. If you want the method rather than the hardware, start with why app blockers stop working after a week — it applies whether or not you ever buy anything from us.
Emergency unlocks exist for a reason
If a group project blows up at midnight and the key is three floors away, you are not stranded. Emergency unlocks are limited rather than unlimited, which is exactly the point — a cost that can be paid infinitely is not a cost — but they are always there, and calls, Maps and your alarm were never blockable in the first place.
A flat battery is the same story. The key runs on a single AAA you can replace at any shop, and a dead one never leaves you locked out of your own phone. The full account is on how emergency unlocks work.
The three that matter most here
Blocking your phone while studying
The full setup: separating study tools from study-adjacent ones, session length, and the objection about family being able to reach you.
Read the setupGuideHow to stop doomscrolling, without relying on willpower
What the scroll is actually doing, and the changes that survive contact with a bad evening.
Read the guideGuideWhy app blockers stop working after a week
The failure every software blocker shares, and what has to be true of a limit for it to still be there in month three.
Read the guideSetting it up on your own phone: block apps on Android or block apps on iPhone — both walk through the free built-in options first, including the ones that need no purchase at all.
The ones students actually ask
Is there a student discount?
No. There is no student price and no student code today, and we would rather say so than run a page that implies one and a checkout that refuses it. The part that matters most while you are deciding is free anyway: the blocking app costs nothing and has no subscription, so you can run a full revision block on a timer before you spend anything. The key is the only thing that costs money, and you buy it once.
I share a room. Where does the key go?
Hand it to whoever you share with, or to a study partner on another floor. That works better than any hiding place, because getting it back involves asking somebody. If you are alone, anywhere your phone cannot pick up the key over Bluetooth from where you sit — a locker, the far end of a corridor, a bag left at a reading-room desk.
Does it need internet, an account, or my college email?
None of the three. Locking and unlocking happen entirely on your phone over Bluetooth, with no account and no server involved, so a hostel Wi-Fi outage cannot lock you out and nothing about your sessions is sent anywhere.
What if I need my phone in the middle of a locked session?
Calls, Maps and your alarm are never blockable, so the genuine emergencies are already covered. Beyond that you can walk to the key, or spend one of a capped number of emergency unlocks. The cap is the point — the cost has to be real to work — but it is always payable, and you are never locked out of your own phone.
Will this stop me failing to revise?
No, and anything that claims otherwise is selling you something. It removes one specific excuse — the phone that was on the desk because it was running the timer — and it makes the decision about what you are allowed to check get made once, at the start, instead of forty times an evening. Whether you open the book is still yours.
Try a blocked session before you buy anything.
Download the app, build one study mode, and lock it for ninety minutes on a timer. If the idea works for you, the key is what makes it survive the tenth session — one payment, no subscription, GST invoice, free shipping across India.