# Watimer vs Hydrelle

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

Both are free to download. Watimer sells 2 in-app purchases, starting at $4.99 per month and Hydrelle sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Watimer ships an update every 10 months, Hydrelle every 3 weeks. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Watimer | Hydrelle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/watimer-hydration-reminder/id6741464170/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 85 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kota tada](https://appshunter.io/developer/1658942612) | [Tomohito Kii](https://appshunter.io/developer/1689523321) |

## What reviewers say

### Watimer

[App page](https://appshunter.io/ios/app/watimer-hydration-reminder/id6741464170)

This app helps you maintain a healthy lifestyle by providing timely reminders to drink water. Easily log your intake and manage hydration goals to improve concentration, reduce fatigue, and boost metabolism. Make tracking your daily water consumption a simple habit.

**Highlights:** Timely hydration reminders, Easy water intake logging, Hydration goal management, Health benefit tracking, Habit formation support

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-free for 1 month | $4.99 | per month |
| Ad-free for 1 year | $49.99 | per year |


### Hydrelle

[App page](https://appshunter.io/ios/app/hydrelle-water-tracker/id6761470806)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $14.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is Watimer free?

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

### Is Hydrelle free?

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

### Do Watimer or Hydrelle have ads?

Both Watimer and Hydrelle show ads.

### Which is updated more often, Watimer or Hydrelle?

Watimer ships an update every 10 months, and Hydrelle every 3 weeks. Most recently, Watimer was updated on October 30, 2026 and Hydrelle on November 9, 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.*