# HydroTimer vs Time Notes

The clearest difference is update cadence: Time Notes at every 3 months against HydroTimer's every 10 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HydroTimer ships an update every 10 months, Time Notes every 3 months. The most recent releases landed on November 9, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | HydroTimer | Time Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 months** |
| Size | 2 MB | 9 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aurelis Limited](https://appshunter.io/developer/1821243565) | [FENGHUI (HK) HOLDINGS LIMITED](https://appshunter.io/developer/1722133514) |

## What reviewers say

### HydroTimer

[App page](https://appshunter.io/ios/app/hydrotimer/id6748376181)

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

**In-app purchases:** none


### Time Notes

[App page](https://appshunter.io/ios/app/time-notes-diary-with-lock/id6748808941)

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroTimer free?

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

### Is Time Notes free?

Time Notes is free to download, with no in-app purchases.

### Do HydroTimer or Time Notes have ads?

Neither HydroTimer nor Time Notes shows ads.

### Which is updated more often, HydroTimer or Time Notes?

HydroTimer ships an update every 10 months, and Time Notes every 3 months. Most recently, HydroTimer was updated on November 9, 2026 and Time Notes on November 8, 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.*