# みずたま vs Hydriva

The clearest difference is in-app purchases: みずたま at none against Hydriva's 3. みずたま also leads on update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Hydriva sells 3 in-app purchases, starting at $2.99 per month. みずたま asks for nothing beyond the download.

みずたま ships an update every 4 days, Hydriva every 2 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | みずたま | Hydriva |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydriva-water-tracker/id6800518499/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | **Free** | Freemium |
| Size | 64 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hayato Tsuchikawa](https://appshunter.io/developer/1863967283) | [Tran Ngoc Trung](https://appshunter.io/developer/6800518501) |

## What reviewers say

### みずたま

[App page](https://appshunter.io/ios/app/id6765880982)

This app helps you stay hydrated by tracking your water intake with a cute, interactive companion. It gamifies the process with a character that reacts to your progress, making hydration fun and motivating. Enjoy a visually pleasing and minimalist experience focused solely on water consumption.

**Highlights:** Interactive character that reacts to hydration progress, Customizable reminders, Home screen widgets, Daily, weekly, and monthly statistics, Streak tracking, Preset drink registration, Data privacy focused

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

**In-app purchases:** none


### Hydriva

[App page](https://appshunter.io/ios/app/hydriva-water-tracker/id6800518499)

Effortlessly track your daily water intake with smart goals and gentle reminders. Log various beverages with a single tap and visualize your progress with motivating achievements and insights. Your hydration data remains private and on your device.

**Highlights:** Smart daily hydration goals, One-tap logging for 18+ beverages, Customizable gentle reminders, Visual progress tracking with a filling water drop, Daily streaks and achievement badges, Privacy-focused with no account required

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sip Pro – Monthly | $2.99 | per month |
| Sip Pro – Yearly | $19.99 | per year |
| Sip Pro – Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is みずたま free?

みずたま is free to download, with no in-app purchases.

### Is Hydriva free?

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

### Do みずたま or Hydriva have ads?

Neither みずたま nor Hydriva shows ads.

### Which is updated more often, みずたま or Hydriva?

みずたま ships an update every 4 days, and Hydriva every 2 weeks. Most recently, みずたま was updated on October 31, 2026 and Hydriva on October 31, 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.*