Decima vs Hidden Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decima
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The application you have before you is but a small attempt at working with time. Since it's a precious commodity all we can do is spend it wisely. That's why I've decided to spend a bit of my time and create Decima (named after Roman Parca, the female personification of destiny) so that you don't have to ;) So what you can do with Decima? In the current version 1.1 (Joséphine) you can: • create multiple timers • set multiple alerts per timer to track time expenditure • use it on both: your iPhone and Apple Watch (iPhone application is necessary) • start/stop timers on demand from your iPhone/iPad or Apple Watch • organize your time in sets • see total/partial time spent for a particular timer • automatically synchronise data between your iPhone and your Apple Watch (timer started on your phone can be paused on your Apple Watch and vice-versa) Have fun. Catch me at krzyspmac@twitter or contact (at) krzysp.net
Hidden Timer
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A timer app that allows user to hide the time while the timer is running.
Screenshots
Verdict
The clearest difference is in-app purchases: Hidden Timer at none against Decima's 1. Hidden Timer also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.8.3 vs 17.0). Decima's advantage is ads (none vs shown). On price and device support 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. Decima sells 1 one-off in-app purchase. Hidden Timer asks for nothing beyond the download.
Decima ships an update every 2 months, Hidden Timer every 2 weeks. The most recent releases landed on September 25, 2026 and September 15, 2026 respectively.
| Parameter | Decima | Hidden Timer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.8.3 — better |
| Further details — not scored | ||
| Size | 12 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Krzysztof Pawlowski | Hideaki Uchikoshi |
In-app purchases
Decima
- The Manipulator$0.99
Hidden Timer
No in-app purchases
