# Math Keeper+ vs Mole OTG

The clearest difference is ads: Math Keeper+ at none against Mole OTG's shown. Math Keeper+ also leads on iOS requirement (9.0 vs 12.0). Mole OTG's advantage is update cadence (daily vs every 3 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Math Keeper+ ships an update every 3 months, Mole OTG daily. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Math Keeper+ | Mole OTG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/math-keeper-plus/id1263494799/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free | — |
| Size | 9 MB | 31 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [William Wu](https://appshunter.io/developer/1263494798) | [Japality Limited](https://appshunter.io/developer/1574046707) |

## What reviewers say

### Math Keeper+

[App page](https://appshunter.io/ios/app/math-keeper-plus/id1263494799)

This app serves as a quick reference for high school math formulas, allowing users to review concepts or add their own notes and formulas. It includes a built-in calculator for convenience.

**Highlights:** Over 100 math formulas, Edit existing formulas, Add custom formulas, Write notes, Built-in calculator

**Features:** macOS Compatibility

**In-app purchases:** none


### Mole OTG

[App page](https://appshunter.io/ios/app/mole-otg/id6749512146)

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

**In-app purchases:** none


## Frequently asked questions

### Is Math Keeper+ free?

Math Keeper+ is free to download, with no in-app purchases.

### Is Mole OTG free?

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

### Do Math Keeper+ or Mole OTG have ads?

Mole OTG shows ads; Math Keeper+ does not.

### Which is updated more often, Math Keeper+ or Mole OTG?

Math Keeper+ ships an update every 3 months, and Mole OTG daily. Most recently, Math Keeper+ was updated on October 29, 2026 and Mole OTG on October 28, 2026.

---

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