Most teachers have been here. You find an OMR app, it reads the first sheets beautifully, and halfway through the class set a box appears: you have used your free scans this month. Or the result sheet comes out with a watermark across it. Or the “free” plan turns out to be a fourteen-day trial.
So when an app says free, unlimited, for life, the sensible reaction is suspicion. This article explains exactly what ScanScore gives away, what it charges for, and — the part that matters — why the free half can stay free, so you can judge the promise for yourself instead of taking it on trust.
Why “free” OMR apps usually stop being free
Free plans end when every scan costs the company money. If an app uploads your photo to a server, the server reads the bubbles, and the result comes back, then each sheet you scan is a small bill for computing power and storage. Multiply by thousands of teachers and the free plan has to be rationed. That is where the familiar limits come from:
- A monthly scan cap — 100 sheets is common, which is two or three classes.
- Per-sheet or per-student credits that run out mid-batch.
- Watermarked or locked exports, so the marks are visible but not usable.
- A time-limited trial dressed up as a free plan.
- A small question limit — ten questions free, pay for a real test.
None of that is dishonest in itself; it is just the arithmetic of server-side scanning. The question to ask of any OMR app is simple: where does the reading happen?
Why ScanScore’s scanning can stay free
In ScanScore, the reading happens on your phone. The camera captures the sheet, the app finds the printed frame and corner marks, straightens the page, reads every bubble and works out the score — all on the device, with no internet. Nothing is uploaded, so no server is involved, so your thousandth sheet costs us exactly what your first one did: nothing.
That is the whole reason the promise holds. It is not a launch offer or a growth tactic that will be withdrawn once enough people sign up. There is simply no running cost to pass on, which is why scanning is unlimited on the free plan and on every paid plan alike.
Exactly what is free, forever
No account, no sign-in, no card. Install the app and all of this is yours, with no limit on exams, sheets, classes or students:
You can also keep class lists — imported from Excel or CSV — and every student gets a page showing every exam they have taken and how their average is moving. All free.
What costs money, and why
ScanScore charges only for things that genuinely cost money to run — the parts that live on a server rather than on your phone:
- Backup and the web dashboard — your exams and results stored in the cloud and viewable on any computer.
- Parent and student access — families seeing their own child’s marks.
- Online tests — locked-down browser tests marked on our servers.
- The AI features — writing a question paper, reading an answer key from a photo, importing a class list from a photo of the register. These run on paid AI models, so they use credits. Every new account gets ten free credits to try the paper writer.
Pro is ₹999 a year, paid once, and it does not renew on its own. If you never need any of the above, you never pay — and you lose nothing on the scanning side by staying free.
What “unlimited” is worth: the arithmetic
It is easy to shrug at “unlimited” until you count your own sheets. Take a fairly ordinary teacher: four sections of 40 students, one test a week, roughly 36 teaching weeks.
| Teacher’s year | Sheets | On a 100-a-month free cap | On ScanScore |
|---|---|---|---|
| One test, one section | 40 | Fits | Free |
| One weekly test, four sections | 160 a week | Cap gone in the first week | Free |
| The whole year | About 5,800 | Paid plan needed | Free |
| A coaching centre, 300 students, weekly | About 10,800 | Paid plan per teacher | Free |
Put those figures next to the other ways of marking. A dedicated OMR machine costs ₹50,000 to ₹2,00,000 before you buy its special sheets. Hand-checking 160 sheets a week at even a minute and a half each is four hours of your week — every week. Free and unlimited is not a nice extra here; it decides whether testing every week is realistic at all.
Your first free test in fifteen minutes
Install, and skip the sign-in
ScanScore runs on Android 7.0 or newer. You do not need an account, so there is nothing to fill in before you start.
Make the exam
Name it, pick the subject and the number of questions, and tap in the answer key. It takes about a minute.
Print the sheet
The app makes the OMR sheet as a PDF. Print it at 100% scale on plain A4 — our guide to the best OMR sheet covers designs and printer settings.
Scan the stack
Hold the phone over each sheet. There is no shutter button; it captures by itself once the page is steady, and batch mode keeps the camera ready for the next one.
If it does not read your sheets the way you need, you have lost fifteen minutes and no money. If it does, you have just removed the most tedious hour of your week, for good. For a fuller walk-through, see the complete guide to scanning OMR sheets with a phone.