# mymizu vs Boulder Pass

The clearest difference is update cadence: Boulder Pass at every 3 weeks against mymizu's every 3 months. mymizu's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

mymizu ships an update every 3 months, Boulder Pass every 3 weeks. The most recent releases landed on October 26, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | mymizu | Boulder Pass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (19 ratings)](https://appshunter.io/ios/app/mymizu/id1480535233/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 43.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 52 MB | 21 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SOCIAL INNOVATION JAPAN, GENERAL INC. ASSOCIATION](https://appshunter.io/developer/1480535232) | [Williams Kwan](https://appshunter.io/developer/1658651535) |

## What reviewers say

### mymizu

[App page](https://appshunter.io/ios/app/mymizu/id1480535233)

Discover nearby water refill stations to reduce plastic waste. Track your environmental impact, monitor daily water intake, and contribute to a global database of refill locations. Share your progress and fun facts with friends.

**Highlights:** Find water refill spots, Add new refill locations, Track plastic bottle savings, Track CO2 and money saved, Monitor daily water intake, Set hydration goals, Unlock fun facts and graphics

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

**In-app purchases:** none


### Boulder Pass

[App page](https://appshunter.io/ios/app/boulder-pass/id1658651533)

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

**In-app purchases:** none


## Frequently asked questions

### Is mymizu free?

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

### Is Boulder Pass free?

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

### Do mymizu or Boulder Pass have ads?

Neither mymizu nor Boulder Pass shows ads.

### Which is updated more often, mymizu or Boulder Pass?

mymizu ships an update every 3 months, and Boulder Pass every 3 weeks. Most recently, mymizu was updated on October 26, 2026 and Boulder Pass on October 18, 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.*