# CLF vs Sapling Isle

The clearest difference is in-app purchases: Sapling Isle at none against CLF's 3. Sapling Isle also leads on update cadence (fortnightly vs every 2 months). CLF's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. CLF sells 3 in-app purchases, starting at $3.99 per month. Sapling Isle asks for nothing beyond the download.

CLF ships an update every 2 months, Sapling Isle fortnightly. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | CLF | Sapling Isle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 27 MB | 40 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Davy Raitt](https://appshunter.io/developer/1795318281) | [大鹏 张](https://appshunter.io/developer/937718061) |

## What reviewers say

### CLF

[App page](https://appshunter.io/ios/app/clf-c02-cloud-practitioner/id6746121070)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $14.99 | per year |
| Pro Lifetime | $19.99 | one-time |


### Sapling Isle

[App page](https://appshunter.io/ios/app/sapling-isle-physics-lab/id6792211746)

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

**In-app purchases:** none


## Frequently asked questions

### Is CLF free?

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

### Is Sapling Isle free?

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

### Do CLF or Sapling Isle have ads?

Neither CLF nor Sapling Isle shows ads.

### Which is updated more often, CLF or Sapling Isle?

CLF ships an update every 2 months, and Sapling Isle fortnightly. Most recently, CLF was updated on September 25, 2026 and Sapling Isle on September 10, 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.*