Answer-sheet design, reading, marking, candidate registers and exports. The table at the end shows exactly which features are on Windows and which on Android.
Set 1 to 200 questions, 3 to 6 options, a roll-number grid and a sheet number. The layout shrinks the bubbles as the sheet fills, so 200 questions still fit one A4 page.
The four corner markers are located and the page is straightened before a single bubble is read, so a sheet photographed at an angle or under a shadow is measured in the right place.
Give every question its own mark for a correct answer and its own deduction for a wrong one, or leave negative marking off and each correct answer counts 1.
The engine is tested against sheet images made hard on purpose: rotated, shadowed, cropped and low quality. These are the results from the most recent run, on 4 September 2026.
45 damaged sheet images, four corners each. A corner that could not be proven was refused, never guessed.
No answer was read as a confident wrong letter. The few misreads were all flagged for review as two marks or blank.
Every score was compared with an independent calculator written from the marking rules.
Results on the test images, not a promise for every sheet: printing, filling and scanning all affect a real read, which is why flagged sheets are always shown to you.
Checked against the source of both apps. Where a platform does a thing differently, the table says how.
| Feature | Windows | Android |
|---|---|---|
| Design an A4 sheet: title, subtitle, extra title and custom fields | Yes | Yes |
| 1 to 200 questions in 2, 4 or 5 columns | Yes | Yes |
| 3 to 6 options per question (A to F) | Yes | Yes |
| Roll-number grid, 1 to 9 digits | Yes | Yes |
| Sheet numbering, 001 to 999 | Yes | Yes |
| Direct to a chosen printer, forced to A4 | Print the saved images at A4 from any app | |
| Save sheets to file | PNG at 600 DPI, PDF of up to 20 sheets | One PNG per sheet at 300 DPI |
| Test-sheet check before a print run | Yes | Not available |
| Feature | Windows | Android |
|---|---|---|
| Enter the key by hand | Yes | Yes |
| Read the key from a filled reference sheet | Yes | Not available |
| Negative marking | Yes | Yes |
| Different marks per question | Yes | Yes |
| Feature | Windows | Android |
|---|---|---|
| Corner-marker detection and perspective correction | Yes | Yes |
| Place corners by hand when a marker cannot be proven | Yes | Yes |
| Roll number and sheet number recognition | Yes | Yes |
| Batch grading, reviewed in one table | Yes | Yes |
| Sheets from image files | JPG, PNG and PDF | From the photo gallery |
| Sheets from the camera | Not available | Yes |
| Sheets from a document scanner | WIA feeder and flatbed | Not available |
| Flags for multiple marks, blanks and duplicate sheet numbers | Yes | Yes |
| Correct a detected roll number, serial or name | Yes | Yes |
| Feature | Windows | Android |
|---|---|---|
| Classes with their own register of students | Yes | Yes |
| Import a class list from Excel (.xlsx) or Word (.docx) | Yes | Yes |
| Names filled in from the register by roll number | Yes | Yes |
| Feature | Windows | Android |
|---|---|---|
| Results per exam, with each candidate’s answers | Yes | Yes |
| Excel workbook (.xlsx), one row per candidate | Yes | Yes |
| Marked sheet images | Yes | Yes |
| PDF of marked sheets | One per candidate, or one combined | One file for the exam |
| Results backup file (JSON) that opens on the other platform | Yes | Yes |
| Sheet templates and answer keys as files | Yes | Yes |
| Share a result | Result PDF, or a WhatsApp chat opened for you | Through the Android share sheet |
| Feature | Windows | Android |
|---|---|---|
| Works offline | After one-time activation | Grading, once the day’s allowance is held |
| Licence | Per device, permanent or time-limited | Free daily allowance with sign-in |
| Themes | Five | Light and dark, following the system |
| Student data and sheet images stay on the device | Yes | Yes |
Not offered on either platform: CSV export, cloud sync of results, an iPhone app.
Install OMR Software on a Windows PC, design a sheet for your next test, and print a test copy before the real run.