# Lenna Chat (Legacy) vs sProton

The clearest difference is update cadence: sProton at monthly against Lenna Chat (Legacy)'s every 2 months. Lenna Chat (Legacy)'s advantage is iOS requirement (12.4 vs 15.6). 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.

Lenna Chat (Legacy) ships an update every 2 months, sProton monthly. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Lenna Chat (Legacy) | sProton |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 23 MB | 41 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SD Tech](https://appshunter.io/developer/1339552954) | [Smartping Ai Private Limited](https://appshunter.io/developer/1691466485) |

## What reviewers say

### Lenna Chat (Legacy)

[App page](https://appshunter.io/ios/app/lenna-chat-legacy/id6445840405)

**Features:** macOS Compatibility

**In-app purchases:** none


### sProton

[App page](https://appshunter.io/ios/app/sproton/id6449994219)

**In-app purchases:** none


## Frequently asked questions

### Is Lenna Chat (Legacy) free?

Lenna Chat (Legacy) is free to download, with no in-app purchases.

### Is sProton free?

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

### Do Lenna Chat (Legacy) or sProton have ads?

Neither Lenna Chat (Legacy) nor sProton shows ads.

### Which is updated more often, Lenna Chat (Legacy) or sProton?

Lenna Chat (Legacy) ships an update every 2 months, and sProton monthly. Most recently, Lenna Chat (Legacy) was updated on October 12, 2026 and sProton on October 24, 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.*