AR vProtractor vs Catodoro
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
AR vProtractor
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You can put a virtual protractor using AR technology that can be placed on a desk or the floor. When you launch the app, please move your iPhone left and right to recognize the surrounding space. Touch the screen to locate where you want to place the virtual protractor, then horizontal and vertical protractors will be displayed at the point you selected. You can turn the virtual protractors left or right with your finger on the screens. You can move protractors horizontal position with two fingers scroll, and vertical position by three fingers scroll. The protractors are anchored to the surrounding feature point with an AR Anchor.Β Push "Relocate" button to put new protractors. Push "Grid" button to display horizontal grid to align protractors to edge of room or desk.
Catodoro
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A cat themed pomodoro app.
Screenshots
Verdict
The clearest difference is update cadence: AR vProtractor at every 4 weeks against Catodoro's every 21 months. AR vProtractor also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.5). On price, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AR vProtractor ships an update every 4 weeks, Catodoro every 21 months. The most recent releases landed on October 12, 2026 and October 17, 2026 respectively.
| Parameter | AR vProtractor | Catodoro |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks β better | Every 21 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 14.0 β better | 17.5 |
| Further details β not scored | ||
| Size | 58 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazufumi Suzuki | Suguru Tokuda |
In-app purchases
AR vProtractor
No in-app purchases
Catodoro
No in-app purchases
