# Hydro by Vinze vs Octi Flow

The clearest difference is update cadence: Octi Flow at every 2 weeks against Hydro by Vinze's every 2 months. Octi Flow also leads on iOS requirement (15.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Hydro by Vinze sells 1 one-off in-app purchase and Octi Flow sells 1 in-app purchase, starting at $7.99 per year. Whichever you choose, the download price is not the number that matters.

Hydro by Vinze ships an update every 2 months, Octi Flow every 2 weeks. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Hydro by Vinze | Octi Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 3 MB | 169 MB |
| Requires iOS | 26.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Patryk Surmacz](https://appshunter.io/developer/1880367835) | [Katsiaryna Filimonava](https://appshunter.io/developer/6783334532) |

## What reviewers say

### Hydro by Vinze

[App page](https://appshunter.io/ios/app/hydro-by-vinze/id6759726988)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | one-time |


### Octi Flow

[App page](https://appshunter.io/ios/app/octi-flow-water-tracker/id6783334530)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Octi Premium | $7.99 | per year |


## Frequently asked questions

### Is Hydro by Vinze free?

Hydro by Vinze is free to download, with in-app purchases available.

### Is Octi Flow free?

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

### Do Hydro by Vinze or Octi Flow have ads?

Neither Hydro by Vinze nor Octi Flow shows ads.

### Which is updated more often, Hydro by Vinze or Octi Flow?

Hydro by Vinze ships an update every 2 months, and Octi Flow every 2 weeks. Most recently, Hydro by Vinze was updated on November 9, 2026 and Octi Flow on November 5, 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.*