# Decima vs Hidden Timer

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.

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.

## The numbers

| Metric | Decima | Hidden Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 12 MB | 35 MB |
| Requires iOS | 17.0 | **15.8.3** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Krzysztof Pawlowski](https://appshunter.io/developer/1216003515) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Decima

[App page](https://appshunter.io/ios/app/decima/id1498371556)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Manipulator | $0.99 | one-time |


### Hidden Timer

[App page](https://appshunter.io/ios/app/hidden-timer/id6502872588)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decima free?

Decima is free to download, with in-app purchases available.

### Is Hidden Timer free?

Hidden Timer is free to download, with no in-app purchases.

### Do Decima or Hidden Timer have ads?

Hidden Timer shows ads; Decima does not.

### Which is updated more often, Decima or Hidden Timer?

Decima ships an update every 2 months, and Hidden Timer every 2 weeks. Most recently, Decima was updated on September 25, 2026 and Hidden Timer on September 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*