# SLS Classic vs Forens

The clearest difference is update cadence: Forens at every 3 weeks against SLS Classic's every 2 months. SLS Classic's advantage is iOS requirement (15.6 vs 26.2). 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.

SLS Classic ships an update every 2 months, Forens every 3 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SLS Classic | Forens |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 39 MB | 6 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Novus Leo](https://appshunter.io/developer/1546393100) | [Gijs Raggers](https://appshunter.io/developer/1438841415) |

## What reviewers say

### SLS Classic

[App page](https://appshunter.io/ios/app/sls-classic/id6504080950)

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

**In-app purchases:** none


### Forens

[App page](https://appshunter.io/ios/app/forens-trein-planner/id6760242147)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SLS Classic free?

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

### Is Forens free?

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

### Do SLS Classic or Forens have ads?

Neither SLS Classic nor Forens shows ads.

### Which is updated more often, SLS Classic or Forens?

SLS Classic ships an update every 2 months, and Forens every 3 weeks. Most recently, SLS Classic was updated on October 27, 2026 and Forens 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.*