# KittyKitty Add Subtract vs Undumb

The clearest difference is rating: Undumb at 5.0 against KittyKitty Add Subtract's 4.7. KittyKitty Add Subtract's advantage is ratings volume (13 vs 3) and iOS requirement (12.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. KittyKitty Add Subtract sells 10 one-off in-app purchases and Undumb sells 2 in-app purchases, starting at $5.00 per month. Whichever you choose, the download price is not the number that matters.

Undumb holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 13 and 3 respectively.

KittyKitty Add Subtract ships an update every 4 days, Undumb every 9 days. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | KittyKitty Add Subtract | Undumb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (13 ratings)](https://appshunter.io/ios/app/kittykitty-add-subtract/id1234885830/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/undumb-brain-training/id6800177759/reviews)** |
| Number of ratings | **13** | 3 |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 95 MB | 53 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Angry Baby Studios, LLC](https://appshunter.io/developer/1221623027) | [FigLantern LLC](https://appshunter.io/developer/6800177761) |

## What reviewers say

### KittyKitty Add Subtract

[App page](https://appshunter.io/ios/app/kittykitty-add-subtract/id1234885830)

This educational game helps preschoolers and kindergartners master basic addition and subtraction. It offers a unique interactive workspace with animated characters and a reward system to encourage practice and track progress.

**Highlights:** Addition and subtraction practice, Interactive workspace, Progress tracking, Difficulty adjustment, Reward system, Certificates of achievement

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Item Set: Love Angel | $0.99 | one-time |
| Item Set: Naughty Devil | $0.99 | one-time |
| Item Set: Ballerina | $0.99 | one-time |
| Item Set: Cutie Bunny | $0.99 | one-time |
| Item Set: Polka Dot Clown | $0.99 | one-time |
| Item Set: Handsome Man | $0.99 | one-time |
| Item Set: Nerdy Panda | $0.99 | one-time |
| Item Set: Ahoy! Pirate | $0.99 | one-time |
| Item Set: Cool Tomato | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |


### Undumb

[App page](https://appshunter.io/ios/app/undumb-brain-training/id6800177759)

This app offers daily brain workouts designed to enhance creativity, critical thinking, and focus, especially for those using AI tools regularly. It provides hand-crafted puzzles to combat 'AI-brain-drain' and offers a cognitive profile to track progress.

**Highlights:** Daily brain workouts, Enhances creativity, Improves critical thinking, Boosts focus, Cognitive profile tracking, AI-brain-drain combat

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Undumb Monthly | $5.00 | per month |
| Undumb Annual | $30.00 | per year |


## Frequently asked questions

### Is KittyKitty Add Subtract free?

KittyKitty Add Subtract is free to download, with in-app purchases available.

### Is Undumb free?

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

### Which has better reviews, KittyKitty Add Subtract or Undumb?

Undumb is rated higher. KittyKitty Add Subtract averages 4.7 out of 5 from 13 ratings, while Undumb averages 5.0 from 3 ratings.

### Do KittyKitty Add Subtract or Undumb have ads?

Neither KittyKitty Add Subtract nor Undumb shows ads.

### Which is updated more often, KittyKitty Add Subtract or Undumb?

KittyKitty Add Subtract ships an update every 4 days, and Undumb every 9 days. Most recently, KittyKitty Add Subtract was updated on November 2, 2026 and Undumb on November 6, 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.*