# Mathius vs Unfog

The clearest difference is update cadence: Unfog at every 2 days against Mathius's fortnightly. Mathius's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Mathius sells 4 one-off in-app purchases and Unfog sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Mathius ships an update fortnightly, Unfog every 2 days. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Mathius | Unfog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 112 MB | 80 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MEHMET NURI ULGEN](https://appshunter.io/developer/1788081478) | [BITSEC SP. Z O.O.](https://appshunter.io/developer/1801990616) |

## What reviewers say

### Mathius

[App page](https://appshunter.io/ios/app/mathius-ai-homework-helper/id6757203951)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Credits | $1.99 | one-time |
| 30 Credits | $4.99 | one-time |
| 75 Credits | $9.99 | one-time |
| 150 Credits | $16.99 | one-time |


### Unfog

[App page](https://appshunter.io/ios/app/unfog-feynman-study-notes/id6776245365)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unfog weekly | $2.99 | per 7 days |
| Unfog Monthly | $17.99 | per month |
| Unfog Annual | $29.99 | per year |


## Frequently asked questions

### Is Mathius free?

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

### Is Unfog free?

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

### Do Mathius or Unfog have ads?

Neither Mathius nor Unfog shows ads.

### Which is updated more often, Mathius or Unfog?

Mathius ships an update fortnightly, and Unfog every 2 days. Most recently, Mathius was updated on October 5, 2026 and Unfog on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*