# KnowDay vs MathMentor Pro

The clearest difference is in-app purchases: KnowDay at none against MathMentor Pro's 2. KnowDay also leads on update cadence (every 5 weeks vs every 3 months) and iOS requirement (15.1 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. MathMentor Pro sells 2 in-app purchases, starting at $9.99 per month. KnowDay asks for nothing beyond the download.

KnowDay ships an update every 5 weeks, MathMentor Pro every 3 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | KnowDay | MathMentor Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Size | 67 MB | 18 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Brouwer](https://appshunter.io/developer/1870224712) | [SHIHYI HSUEH](https://appshunter.io/developer/6772632316) |

## What reviewers say

### KnowDay

[App page](https://appshunter.io/ios/app/knowday/id6758007504)

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

**In-app purchases:** none


### MathMentor Pro

[App page](https://appshunter.io/ios/app/mathmentor-pro/id6772632314)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathMentor Pro | $9.99 | per month |
| MathMentor Pro | $99.99 | per year |


## Frequently asked questions

### Is KnowDay free?

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

### Is MathMentor Pro free?

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

### Do KnowDay or MathMentor Pro have ads?

Neither KnowDay nor MathMentor Pro shows ads.

### Which is updated more often, KnowDay or MathMentor Pro?

KnowDay ships an update every 5 weeks, and MathMentor Pro every 3 months. Most recently, KnowDay was updated on November 9, 2026 and MathMentor Pro on October 31, 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.*