# Hydroo vs Watimer

The clearest difference is in-app purchases: Hydroo at none against Watimer's 2. Hydroo also leads on ads (none vs shown) and update cadence (fortnightly vs every 13 months). Watimer's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price there is nothing between them.

Both are free to download. Watimer sells 2 in-app purchases, starting at $4.99 per month. Hydroo asks for nothing beyond the download.

Hydroo ships an update fortnightly, Watimer every 13 months. The most recent releases landed on May 16, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Hydroo | Watimer |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 13 months |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 27 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Khawlah Bawazir](https://appshunter.io/developer/1627702695) | [kota tada](https://appshunter.io/developer/1658942612) |

## What reviewers say

### Hydroo

[App page](https://appshunter.io/ios/app/hydroo/id6504790565)

**In-app purchases:** none


### 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

**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 |


## Frequently asked questions

### Is Hydroo free?

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

### Is Watimer free?

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

### Do Hydroo or Watimer have ads?

Watimer shows ads; Hydroo does not.

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

Hydroo ships an update fortnightly, and Watimer every 13 months. Most recently, Hydroo was updated on May 16, 2026 and Watimer on September 20, 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.*