# FastOnce vs Water

FastOnce and Water are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

FastOnce ships an update every 6 days, Water weekly. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | FastOnce | Water |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Size | 6 MB | 39 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrii Zakharov](https://appshunter.io/developer/6779217338) | [Supafast Tech LLC](https://appshunter.io/developer/1880771750) |

## What reviewers say

### FastOnce

[App page](https://appshunter.io/ios/app/fastonce-fasting-timer/id6780015850)

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

**In-app purchases:** none


### Water

[App page](https://appshunter.io/ios/app/water-hydration-reminder/id6797230161)

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

**In-app purchases:** none


## Frequently asked questions

### Is FastOnce free?

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

### Is Water free?

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

### Do FastOnce or Water have ads?

Neither FastOnce nor Water shows ads.

### Which is updated more often, FastOnce or Water?

FastOnce ships an update every 6 days, and Water weekly. Most recently, FastOnce was updated on September 9, 2026 and Water on September 13, 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.*