# Octi Flow vs SmartSip

The clearest difference is in-app purchases: SmartSip at none against Octi Flow's 1. Octi Flow's advantage is update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.0 vs 18). On price, ads and device support there is nothing between them.

Both are free to download. Octi Flow sells 1 in-app purchase, starting at $7.99 per year. SmartSip asks for nothing beyond the download.

Octi Flow ships an update every 2 weeks, SmartSip every 2 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | Octi Flow | SmartSip |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 169 MB | 5 MB |
| Requires iOS | **15.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Katsiaryna Filimonava](https://appshunter.io/developer/6783334532) | [长贵 周](https://appshunter.io/developer/6779968395) |

## What reviewers say

### 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 |


### SmartSip

[App page](https://appshunter.io/ios/app/smartsip-hydration-tracker/id6790656642)

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

**In-app purchases:** none


## Frequently asked questions

### Is Octi Flow free?

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

### Is SmartSip free?

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

### Do Octi Flow or SmartSip have ads?

Neither Octi Flow nor SmartSip shows ads.

### Which is updated more often, Octi Flow or SmartSip?

Octi Flow ships an update every 2 weeks, and SmartSip every 2 months. Most recently, Octi Flow was updated on October 31, 2026 and SmartSip 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.*