# Factors and Multiples vs Find Missing in Subtraction

The clearest difference is price: Find Missing in Subtraction at Free against Factors and Multiples's $2.99. Find Missing in Subtraction also leads on device support (3 vs 1). Factors and Multiples's advantage is in-app purchases (none vs 1) and update cadence (every 37 months vs every 121 months). On ads there is nothing between them.

Find Missing in Subtraction is free to download; Factors and Multiples costs $2.99 up front. Find Missing in Subtraction sells 1 one-off in-app purchase. Factors and Multiples asks for nothing beyond the download.

Factors and Multiples ships an update every 37 months, Find Missing in Subtraction every 121 months. The most recent releases landed on October 26, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Factors and Multiples | Find Missing in Subtraction |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/find-missing-in-subtraction/id1078068895/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 37 months** | Every 121 months |
| Monetization | — | Free |
| Size | 16 MB | 110 MB |
| Requires iOS | **8.0** | 10.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Red Hong](https://appshunter.io/developer/542314714) | [Blooming Kids Software LLC](https://appshunter.io/developer/501015942) |

## What reviewers say

### Factors and Multiples

[App page](https://appshunter.io/ios/app/factors-and-multiples/id909532243)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Factors and Multiples free?

Factors and Multiples costs $2.99, with no in-app purchases.

### Is Find Missing in Subtraction free?

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

### Do Factors and Multiples or Find Missing in Subtraction have ads?

Neither Factors and Multiples nor Find Missing in Subtraction shows ads.

### Which is updated more often, Factors and Multiples or Find Missing in Subtraction?

Factors and Multiples ships an update every 37 months, and Find Missing in Subtraction every 121 months. Most recently, Factors and Multiples was updated on October 26, 2026 and Find Missing in Subtraction on November 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.*