# CaffeineX vs Soln

The clearest difference is in-app purchases: CaffeineX at none against Soln's 1. CaffeineX also leads on update cadence (every 3 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Soln sells 1 one-off in-app purchase. CaffeineX asks for nothing beyond the download.

CaffeineX ships an update every 3 days, Soln every 3 weeks. The most recent releases landed on September 20, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | CaffeineX | Soln |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 3 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [来 徐](https://appshunter.io/developer/1871065941) | [Nan Yu](https://appshunter.io/developer/1559044036) |

## What reviewers say

### CaffeineX

[App page](https://appshunter.io/ios/app/caffeinex/id6760469305)

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

**In-app purchases:** none


### Soln

[App page](https://appshunter.io/ios/app/soln/id6772215173)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Soln | $5.99 | one-time |


## Frequently asked questions

### Is CaffeineX free?

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

### Is Soln free?

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

### Do CaffeineX or Soln have ads?

Neither CaffeineX nor Soln shows ads.

### Which is updated more often, CaffeineX or Soln?

CaffeineX ships an update every 3 days, and Soln every 3 weeks. Most recently, CaffeineX was updated on September 20, 2026 and Soln on September 9, 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.*