# Find Missing in Subtraction vs Number Track

The clearest difference is update cadence: Number Track at every 39 months against Find Missing in Subtraction's every 121 months. Find Missing in Subtraction's advantage is iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Find Missing in Subtraction sells 1 one-off in-app purchase and Number Track sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Find Missing in Subtraction ships an update every 121 months, Number Track every 39 months. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Find Missing in Subtraction | Number Track |
| --- | --- | --- |
| Price | Free | 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 121 months | **Every 39 months** |
| Monetization | Free | — |
| Size | 110 MB | 30 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blooming Kids Software LLC](https://appshunter.io/developer/501015942) | [BrainTrain Inc.](https://appshunter.io/developer/584469134) |

## 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 |


### Number Track

[App page](https://appshunter.io/ios/app/number-track-memory-trainer/id1208566780)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


## Frequently asked questions

### Is Find Missing in Subtraction free?

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

### Is Number Track free?

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

### Do Find Missing in Subtraction or Number Track have ads?

Neither Find Missing in Subtraction nor Number Track shows ads.

### Which is updated more often, Find Missing in Subtraction or Number Track?

Find Missing in Subtraction ships an update every 121 months, and Number Track every 39 months. Most recently, Find Missing in Subtraction was updated on October 20, 2026 and Number Track on October 5, 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.*