# Hydre Reminder vs Shiftrest

The clearest difference is in-app purchases: Hydre Reminder at none against Shiftrest's 3. Shiftrest's advantage is update cadence (every 2 weeks vs every 12 months) and iOS requirement (16.0 vs 18). On price, ads and device support there is nothing between them.

Both are free to download. Shiftrest sells 3 in-app purchases, starting at $1.99 per 7 days. Hydre Reminder asks for nothing beyond the download.

Hydre Reminder ships an update every 12 months, Shiftrest every 2 weeks. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Hydre Reminder | Shiftrest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 weeks** |
| Size | 4 MB | 14 MB |
| Requires iOS | 18 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [durali mete kanat](https://appshunter.io/developer/1840847435) | [EMRE KEP](https://appshunter.io/developer/1881732853) |

## What reviewers say

### Hydre Reminder

[App page](https://appshunter.io/ios/app/hydre-reminder/id6752771177)

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

**In-app purchases:** none


### Shiftrest

[App page](https://appshunter.io/ios/app/shiftrest-shift-sleep-planner/id6760971127)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $3.99 | per month |
| Yearly | $24.99 | per year |


## Frequently asked questions

### Is Hydre Reminder free?

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

### Is Shiftrest free?

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

### Do Hydre Reminder or Shiftrest have ads?

Neither Hydre Reminder nor Shiftrest shows ads.

### Which is updated more often, Hydre Reminder or Shiftrest?

Hydre Reminder ships an update every 12 months, and Shiftrest every 2 weeks. Most recently, Hydre Reminder was updated on September 24, 2026 and Shiftrest on September 23, 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.*