Common Error vs Nivasity
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Common Error
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People with English as their second language make some very common mistakes while speaking or writing in English. The mistakes most of the times are grammar related, framing the questions in wrong manner or small preposition/articles mistakes. Some mistakes could be very embarrassing. With this app you can understand, learn & improve on those mistakes.
Nivasity
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Nivasity is the easiest way to get your course materials and pay for them, all from your phone. Fund your Nivasity wallet by bank transfer, buy the materials your department needs, and get a receipt the moment you pay. No queues, no lost slips. WHAT YOU CAN DO ⢠Shop course materials for your department and level ⢠Pay from your wallet with a quick, secure PIN ⢠Fund your wallet anytime from your own bank account number ⢠Send money to course mates in seconds ⢠Pay for your course mates' materials in one go with Bulk Pay ⢠Get a receipt for every purchase, ready to share or save ⢠Track every order and wallet transaction in one place ⢠Ask for a material that isn't in the store yet ⢠Get school announcements, alerts and push notifications ⢠Chat with support and follow your tickets in the app ⢠Use light or dark mode, whichever you prefer BUILT FOR STUDENTS Nivasity works with your school, so the materials you see are the ones your lecturers actually listed. Your wallet, orders and receipts stay with your account wherever you sign in. Simple, fast and secure: Nivasity takes care of your course materials so you can focus on your studies.
Screenshots
Verdict
The clearest difference is update cadence: Nivasity at every 5 months against Common Error's every 35 months. Common Error's advantage is iOS requirement (7.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Common Error ships an update every 35 months, Nivasity every 5 months. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.
| Parameter | Common Error | Nivasity |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 35 months | Every 5 months ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 ā better | 16.4 |
| Further details ā not scored | ||
| Size | 7 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Le Thi Quynh Ny | Sannex Tech Ltd |
In-app purchases
Common Error
No in-app purchases
Nivasity
No in-app purchases








