# Lex Protocol vs Flow

The clearest difference is in-app purchases: Flow at none against Lex Protocol's 4. Flow also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Lex Protocol sells 4 in-app purchases, starting at $9.99 per 7 days. Flow asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Lex Protocol | Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 76 MB | 57 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Avci Technologies](https://appshunter.io/developer/1829981739) | [Wing Sum LEE](https://appshunter.io/developer/1877149163) |

## What reviewers say

### Lex Protocol

[App page](https://appshunter.io/ios/app/lex-protocol/id6749322588)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $9.99 | per 7 days |
| Gold Weekly | $12.99 | per 7 days |
| Premium Monthly | $35.00 | per month |
| Gold Monthly | $39.99 | per month |


### Flow

[App page](https://appshunter.io/ios/app/flow-ai-focus-planner/id6761019011)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lex Protocol free?

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

### Is Flow free?

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

### Do Lex Protocol or Flow have ads?

Neither Lex Protocol nor Flow shows ads.

### Which is updated more often, Lex Protocol or Flow?

Lex Protocol ships an update every 3 weeks, and Flow every 3 weeks. Most recently, Lex Protocol was updated on October 7, 2026 and Flow on October 2, 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.*