# ChempZ vs PadelRef

The clearest difference is in-app purchases: ChempZ at none against PadelRef's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PadelRef sells 4 in-app purchases, starting at $1.99 per 7 days. ChempZ asks for nothing beyond the download.

ChempZ ships an update weekly, PadelRef every 9 days. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ChempZ | PadelRef |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Size | 96 MB | 55 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Zsombor Sebok](https://appshunter.io/developer/1853884926) | [Alexey Zhuravlev](https://appshunter.io/developer/6809206021) |

## What reviewers say

### ChempZ

[App page](https://appshunter.io/ios/app/chempz/id6755436559)

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

**In-app purchases:** none


### PadelRef

[App page](https://appshunter.io/ios/app/padelref/id6809206019)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $3.99 | per month |
| Annual | $24.99 | per year |
| PadelRef Premium (Lifetime) | $39.99 | one-time |


## Frequently asked questions

### Is ChempZ free?

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

### Is PadelRef free?

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

### Do ChempZ or PadelRef have ads?

Neither ChempZ nor PadelRef shows ads.

### Which is updated more often, ChempZ or PadelRef?

ChempZ ships an update weekly, and PadelRef every 9 days. Most recently, ChempZ was updated on October 24, 2026 and PadelRef on October 16, 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.*