# 51M vs Slem

The clearest difference is ads: 51M at none against Slem's shown. Slem's advantage is update cadence (every 8 days vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

51M ships an update every 5 months, Slem every 8 days. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 51M | Slem |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 8 days** |
| Size | 37 MB | 54 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [LVH GROUP PTY LTD](https://appshunter.io/developer/1562823126) | [SLEM TECH PTY LTD](https://appshunter.io/developer/1786046407) |

## What reviewers say

### 51M

[App page](https://appshunter.io/ios/app/51m/id1562822614)

**Features:** macOS Compatibility

**In-app purchases:** none


### Slem

[App page](https://appshunter.io/ios/app/slem/id6739556994)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 51M free?

51M is free to download, with no in-app purchases.

### Is Slem free?

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

### Do 51M or Slem have ads?

Slem shows ads; 51M does not.

### Which is updated more often, 51M or Slem?

51M ships an update every 5 months, and Slem every 8 days. Most recently, 51M was updated on September 17, 2026 and Slem on September 14, 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.*