# Subtraction Math vs CSCA

The clearest difference is review sentiment: CSCA at 100% against Subtraction Math's 50%. CSCA also leads on price (Free vs $1.99) and rating (5.0 vs 3.9). Subtraction Math's advantage is device support (5 vs 2). On ratings volume, ads and in-app purchases there is nothing between them.

CSCA is free to download; Subtraction Math costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CSCA holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 50% of Subtraction Math's written reviews are positive against 100% of CSCA's.

Subtraction Math ships an update every 4 months, CSCA every 2 months. The most recent releases landed on September 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Subtraction Math | CSCA |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.9 (7 ratings)](https://appshunter.io/ios/app/subtraction-math-ibbleobble/id978343612/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/csca/id1463687384/reviews)** |
| Number of ratings | **7** | 4 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 17 MB | 147 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KidDotCo](https://appshunter.io/developer/819246599) | [South Florida Science Center And Aquarium Inc.](https://appshunter.io/developer/1463687383) |

## What reviewers say

### Subtraction Math

[App page](https://appshunter.io/ios/app/subtraction-math-ibbleobble/id978343612)

This educational game helps children aged 5-8 practice subtraction skills through engaging drills and multiple-choice questions. It offers a flexible learning pace with an optional timer and vibrant visuals to make arithmetic fun.

**Highlights:** Subtraction drills, Multiple choice format, Adjustable difficulty, Optional timer, Colorful graphics and sounds, Universal purchase

**Features:** iMessage stickers

**In-app purchases:** none


### CSCA

[App page](https://appshunter.io/ios/app/csca/id1463687384)

This app provides engaging science programming and tech ventures focused on computer coding and robotics. It aims to make science exciting through adventure and exploration for students, teachers, and visitors.

**Highlights:** Computer coding programs, Robotics ventures, Science adventure and exploration, Educational outreach, Tech-based learning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction Math free?

Subtraction Math costs $1.99, with no in-app purchases.

### Is CSCA free?

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

### Which has better reviews, Subtraction Math or CSCA?

CSCA is rated higher. Subtraction Math averages 3.9 out of 5 from 7 ratings, while CSCA averages 5.0 from 4 ratings.

### Do Subtraction Math or CSCA have ads?

Neither Subtraction Math nor CSCA shows ads.

### Which is updated more often, Subtraction Math or CSCA?

Subtraction Math ships an update every 4 months, and CSCA every 2 months. Most recently, Subtraction Math was updated on September 22, 2026 and CSCA on September 25, 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.*