# CloudLabs Vector subtraction vs Math Lessons by Voice

The clearest difference is in-app purchases: CloudLabs Vector subtraction at none against Math Lessons by Voice's 1. CloudLabs Vector subtraction also leads on iOS requirement (9.0 vs 15.0). Math Lessons by Voice's advantage is update cadence (weekly vs every 21 months). On price, ads and device support there is nothing between them.

Both are free to download. Math Lessons by Voice sells 1 one-off in-app purchase. CloudLabs Vector subtraction asks for nothing beyond the download.

CloudLabs Vector subtraction ships an update every 21 months, Math Lessons by Voice weekly. The most recent releases landed on September 29, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CloudLabs Vector subtraction | Math Lessons by Voice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Weekly** |
| Size | 70 MB | 4 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Jiovany Orozco](https://appshunter.io/developer/1114670847) | [Aishat Perez](https://appshunter.io/developer/1836701734) |

## What reviewers say

### CloudLabs Vector subtraction

[App page](https://appshunter.io/ios/app/cloudlabs-vector-subtraction/id1633261194)

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Lessons by Voice

[App page](https://appshunter.io/ios/app/math-lessons-by-voice/id6751764275)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $3.99 | one-time |


## Frequently asked questions

### Is CloudLabs Vector subtraction free?

CloudLabs Vector subtraction is free to download, with no in-app purchases.

### Is Math Lessons by Voice free?

Math Lessons by Voice is free to download, with in-app purchases available.

### Do CloudLabs Vector subtraction or Math Lessons by Voice have ads?

Neither CloudLabs Vector subtraction nor Math Lessons by Voice shows ads.

### Which is updated more often, CloudLabs Vector subtraction or Math Lessons by Voice?

CloudLabs Vector subtraction ships an update every 21 months, and Math Lessons by Voice weekly. Most recently, CloudLabs Vector subtraction was updated on September 29, 2026 and Math Lessons by Voice on October 16, 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.*