# KDI CL vs Scratch Math!

The clearest difference is in-app purchases: KDI CL at none against Scratch Math!'s 3. Scratch Math!'s advantage is update cadence (every 3 days vs every 6 weeks) and ratings volume (3 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Scratch Math! sells 3 one-off in-app purchases. KDI CL asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for KDI CL against 5.0 for Scratch Math!. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

KDI CL ships an update every 6 weeks, Scratch Math! every 3 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | KDI CL | Scratch Math! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/kdi-cl/id966811904/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/scratch-math/id6763207187/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 23 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [ido-it Co. Ltd.](https://appshunter.io/developer/610142253) | [Mathias Bakken](https://appshunter.io/developer/1895214623) |

## What reviewers say

### KDI CL

[App page](https://appshunter.io/ios/app/kdi-cl/id966811904)

Access library services with a mobile ID, track seat availability, and reserve study rooms. This app helps users manage their library experience efficiently, including seat reservations and rental verification.

**Highlights:** Mobile ID for library access, Book rental and seat reservation verification, Real-time seat availability tracking, Study room reservation, Smart seat map and reservation system, Seat usage history tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Scratch Math!

[App page](https://appshunter.io/ios/app/scratch-math/id6763207187)

This app provides a hands-on approach to math practice, allowing users to solve problems directly on screen with a built-in scratchpad. It offers various practice activities for arithmetic and fractions, with visual tools and step-by-step explanations to aid understanding and track progress.

**Highlights:** Built-in digital scratchpad for problem-solving, Visual fraction playground with animated models, Step-by-step worked solutions with explanations, Progress tracking for accuracy and streaks, Offline-first functionality with local profiles, Practice activities for addition, subtraction, multiplication, and division

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $4.99 | one-time |
| Buy Me a Coffee | $14.99 | one-time |
| Buy Me a Coffee | $39.99 | one-time |


## Frequently asked questions

### Is KDI CL free?

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

### Is Scratch Math! free?

Scratch Math! is free to download, with in-app purchases available.

### Which has better reviews, KDI CL or Scratch Math!?

KDI CL and Scratch Math! are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do KDI CL or Scratch Math! have ads?

Neither KDI CL nor Scratch Math! shows ads.

### Which is updated more often, KDI CL or Scratch Math!?

KDI CL ships an update every 6 weeks, and Scratch Math! every 3 days. Most recently, KDI CL was updated on October 7, 2026 and Scratch Math! on October 2, 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.*