# Find Missing in Subtraction vs Earth Rotation

The clearest difference is price: Find Missing in Subtraction at Free against Earth Rotation's $0.99. Find Missing in Subtraction also leads on iOS requirement (10.0 vs 15.0). Earth Rotation's advantage is rating (5.0 vs 1.0) and in-app purchases (none vs 1). On ratings volume, ads and device support there is nothing between them.

Find Missing in Subtraction is free to download; Earth Rotation costs $0.99 up front. Find Missing in Subtraction sells 1 one-off in-app purchase. Earth Rotation asks for nothing beyond the download.

Earth Rotation holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Find Missing in Subtraction ships an update every 121 months, Earth Rotation every 22 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Find Missing in Subtraction | Earth Rotation |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/find-missing-in-subtraction/id1078068895/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/earth-rotation/id1610455878/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 121 months | **Every 22 months** |
| Monetization | **Free** | Paid |
| Size | 110 MB | 46 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Blooming Kids Software LLC](https://appshunter.io/developer/501015942) | [Masahiro Tomosada](https://appshunter.io/developer/1587710118) |

## What reviewers say

### Find Missing in Subtraction

[App page](https://appshunter.io/ios/app/find-missing-in-subtraction/id1078068895)

This educational app helps children practice subtraction skills. It presents problems with missing numbers and offers interactive feedback. Users can customize settings like problem layout and number selection, and track progress through detailed reports.

**Highlights:** Interactive subtraction problems, Customizable problem layout (vertical/horizontal), Optional answer prompts, Random number generation, Congratulatory animations, Progress tracking and reports, Test mode

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Finding Missing Number in Subtraction | $3.99 | one-time |


### Earth Rotation

[App page](https://appshunter.io/ios/app/earth-rotation/id1610455878)

Explore a 3D simulation of celestial bodies. Adjust rotation speeds, reverse direction, and alter lighting angles. Choose from three distinct Earth visual styles for an interactive learning experience.

**Highlights:** Adjustable rotation speed, Reverse rotation direction, Adjustable sun lighting angle, Three Earth visual styles, 3D celestial animation

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

**In-app purchases:** none


## Frequently asked questions

### Is Find Missing in Subtraction free?

Find Missing in Subtraction is free to download, with in-app purchases available.

### Is Earth Rotation free?

Earth Rotation costs $0.99, with no in-app purchases.

### Which has better reviews, Find Missing in Subtraction or Earth Rotation?

Earth Rotation is rated higher. Find Missing in Subtraction averages 1.0 out of 5 from 1 ratings, while Earth Rotation averages 5.0 from 1 ratings.

### Do Find Missing in Subtraction or Earth Rotation have ads?

Neither Find Missing in Subtraction nor Earth Rotation shows ads.

### Which is updated more often, Find Missing in Subtraction or Earth Rotation?

Find Missing in Subtraction ships an update every 121 months, and Earth Rotation every 22 months. Most recently, Find Missing in Subtraction was updated on November 2, 2026 and Earth Rotation on November 3, 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.*