# Hidden Timer vs SPHERA Alarm

The clearest difference is in-app purchases: Hidden Timer at none against SPHERA Alarm's 10. SPHERA Alarm's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SPHERA Alarm sells 10 in-app purchases, starting at $1.99 per month. Hidden Timer asks for nothing beyond the download.

## The numbers

| Metric | Hidden Timer | SPHERA Alarm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Size | 35 MB | 79 MB |
| Requires iOS | 15.8.3 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Shin Onoshima](https://appshunter.io/developer/1803371608) |

## What reviewers say

### Hidden Timer

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

**Features:** macOS Compatibility

**In-app purchases:** none


### SPHERA Alarm

[App page](https://appshunter.io/ios/app/sphera-alarm/id6766024241)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SPHERA Plus Monthly | $1.99 | per month |
| SPHERA Plus Yearly | $14.99 | per year |
| Prism Wake | $0.99 | one-time |
| Synapse Tone | $0.99 | one-time |
| Zenith Pulse | $0.99 | one-time |
| Quiet Flux | $0.99 | one-time |
| Solar Thread | $0.99 | one-time |
| Velvet Radar | $0.99 | one-time |
| Soft Circuit | $0.99 | one-time |
| Stellar Mallet | $0.99 | one-time |


## Frequently asked questions

### Is Hidden Timer free?

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

### Is SPHERA Alarm free?

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

### Do Hidden Timer or SPHERA Alarm have ads?

Hidden Timer shows ads; SPHERA Alarm does not.

---

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