# Katakana vs Gravity Math

The clearest difference is update cadence: Gravity Math at every 7 months against Katakana's every 15 months. Gravity Math also leads on iOS requirement (12.0 vs 16.0). Katakana's advantage is price ($0.99 vs $2.99). On ads, in-app purchases and device support there is nothing between them.

Katakana costs $0.99 and Gravity Math $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Katakana ships an update every 15 months, Gravity Math every 7 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Katakana | Gravity Math |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/katakana-learn-and-memorize/id899606645/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 0 MB | 17 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Raphael Wach](https://appshunter.io/developer/896216110) | [Sergey Malugin](https://appshunter.io/developer/562782409) |

## What reviewers say

### Katakana

[App page](https://appshunter.io/ios/app/katakana-learn-and-memorize/id899606645)

Master Japanese Katakana characters quickly and efficiently. This app offers a proven, simple method to learn and memorize all characters in just a few hours, making it ideal for beginners.

**Highlights:** Learn Katakana characters, Memorize Katakana, Fast learning method, Efficient memorization, Proven effectiveness

**Features:** macOS Compatibility

**In-app purchases:** none


### Gravity Math

[App page](https://appshunter.io/ios/app/gravity-math/id1453330374)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Katakana free?

Katakana costs $0.99, with no in-app purchases.

### Is Gravity Math free?

Gravity Math costs $2.99, with no in-app purchases.

### Do Katakana or Gravity Math have ads?

Neither Katakana nor Gravity Math shows ads.

### Which is updated more often, Katakana or Gravity Math?

Katakana ships an update every 15 months, and Gravity Math every 7 months. Most recently, Katakana was updated on October 7, 2026 and Gravity Math on October 10, 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.*