# HydrateLock vs PaceFlip

The clearest difference is in-app purchases: HydrateLock at none against PaceFlip's 1. PaceFlip's advantage is device support (3 vs 1) and iOS requirement (17.0 vs 26.0). On price and ads there is nothing between them.

Both are free to download. PaceFlip sells 1 one-off in-app purchase. HydrateLock asks for nothing beyond the download.

## The numbers

| Metric | HydrateLock | PaceFlip |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 10 MB | 16 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ZHUO KANG](https://appshunter.io/developer/6775824773) | [John Lein](https://appshunter.io/developer/504182228) |

## What reviewers say

### HydrateLock

[App page](https://appshunter.io/ios/app/hydratelock-must-drink-alarm/id6799812964)

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

**In-app purchases:** none


### PaceFlip

[App page](https://appshunter.io/ios/app/paceflip/id6821489074)

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PaceFlip Full Access | $1.99 | one-time |


## Frequently asked questions

### Is HydrateLock free?

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

### Is PaceFlip free?

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

### Do HydrateLock or PaceFlip have ads?

Neither HydrateLock nor PaceFlip shows ads.

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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.*