DET vs Fun Math Arithmetic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DET
This app facilitates the secure setup for a language proficiency exam. It guides users through submitting identification, scanning their face and ID, and performing room and ear scans. The app also configures your phone to record your computer during the test.
- Submit ID information
- Scan face and ID
- Complete room scan
- Perform ear scan
- Set up phone for computer recording
Read full descriptionHide full description
The Duolingo English Test (DET) mobile app provides a stable, secure test setup experience. It does not replace the desktop app for taking the test itself. Test takers will use the app to: Submit their ID information Scan their face and ID Complete their room scan and ear scan Set up their phone to record their computer
Fun Math Arithmetic
Read full descriptionHide full description
Fun-Math is a quick arithmetic game. Answer addition, subtraction, multiplication, and division questions, keep a running score, and try to beat your best. Choose Easy, Medium, or Hard. Type each answer on the number pad. A correct answer adds one point. A wrong answer saves the score if it is one of your best, then starts you again at zero. Your 10 best scores stay on this iPhone, with the highest shown first. There is no account and no sign-in. Pick a color theme from the palette button.
Screenshots
Verdict
The clearest difference is ads: DET at none against Fun Math Arithmetic's shown. Fun Math Arithmetic's advantage is update cadence (every 3 days vs weekly). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DET ships an update weekly, Fun Math Arithmetic every 3 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | DET | Fun Math Arithmetic |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (35 ratings) — better | — |
| Positive reviews | 25.8% of reviews | — |
| Number of ratings | 35 — better | — |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 99 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Duolingo | Ranjodh Singh |
In-app purchases
DET
No in-app purchases
Fun Math Arithmetic
No in-app purchases
