# ZennWidget vs Fermi Practice Drill with AI

The clearest difference is in-app purchases: ZennWidget at none against Fermi Practice Drill with AI's 1. ZennWidget also leads on ads (none vs shown) and update cadence (daily vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Fermi Practice Drill with AI sells 1 in-app purchase, starting at $5.99 per month. ZennWidget asks for nothing beyond the download.

ZennWidget ships an update daily, Fermi Practice Drill with AI every 2 weeks. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ZennWidget | Fermi Practice Drill with AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 2 weeks |
| Size | 36 MB | 21 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [taishin miyamoto](https://appshunter.io/developer/1570395608) | [Yuto Inagaki](https://appshunter.io/developer/1733484400) |

## What reviewers say

### ZennWidget

[App page](https://appshunter.io/ios/app/zennwidget/id6448756495)

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

**In-app purchases:** none


### Fermi Practice Drill with AI

[App page](https://appshunter.io/ios/app/fermi-practice-drill-with-ai/id6748893807)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FerminPro | $5.99 | per month |


## Frequently asked questions

### Is ZennWidget free?

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

### Is Fermi Practice Drill with AI free?

Fermi Practice Drill with AI is free to download, with in-app purchases available.

### Do ZennWidget or Fermi Practice Drill with AI have ads?

Fermi Practice Drill with AI shows ads; ZennWidget does not.

### Which is updated more often, ZennWidget or Fermi Practice Drill with AI?

ZennWidget ships an update daily, and Fermi Practice Drill with AI every 2 weeks. Most recently, ZennWidget was updated on October 13, 2026 and Fermi Practice Drill with AI on October 11, 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.*