# WaterTracker vs HIIT Timer

The clearest difference is in-app purchases: WaterTracker at none against HIIT Timer's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. HIIT Timer sells 1 one-off in-app purchase. WaterTracker asks for nothing beyond the download.

WaterTracker ships an update every 3 weeks, HIIT Timer every 4 weeks. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | WaterTracker | HIIT Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Size | 29 MB | 2 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ethan Milton Wilde](https://appshunter.io/developer/1892997468) | [Hyunwoo Lee](https://appshunter.io/developer/1883358620) |

## What reviewers say

### WaterTracker

[App page](https://appshunter.io/ios/app/watertracker-lifetracker/id6780416566)

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

**In-app purchases:** none


### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer-intervalflow/id6788945849)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IntervalFlow Pro | $9.99 | one-time |


## Frequently asked questions

### Is WaterTracker free?

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

### Is HIIT Timer free?

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

### Do WaterTracker or HIIT Timer have ads?

Neither WaterTracker nor HIIT Timer shows ads.

### Which is updated more often, WaterTracker or HIIT Timer?

WaterTracker ships an update every 3 weeks, and HIIT Timer every 4 weeks. Most recently, WaterTracker was updated on October 31, 2026 and HIIT Timer on November 5, 2026.

---

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