# History Matters vs Engineering Formulas

The clearest difference is in-app purchases: History Matters at none against Engineering Formulas's 3. History Matters also leads on iOS requirement (8.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. History Matters asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | History Matters | Engineering Formulas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 33 MB | 45 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [A Star Education Ltd](https://appshunter.io/developer/1224629480) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### History Matters

[App page](https://appshunter.io/ios/app/history-matters/id1224629481)

**Features:** macOS Compatibility

**In-app purchases:** none


### Engineering Formulas

[App page](https://appshunter.io/ios/app/engineering-formulas-engiref/id6758258119)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Yearly Premium | $29.99 | per year |
| Lifetime Access | $54.99 | one-time |


## Frequently asked questions

### Is History Matters free?

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

### Is Engineering Formulas free?

Engineering Formulas is free to download, with in-app purchases available.

### Do History Matters or Engineering Formulas have ads?

Neither History Matters nor Engineering Formulas shows ads.

### Which is updated more often, History Matters or Engineering Formulas?

History Matters ships an update every 2 months, and Engineering Formulas every 2 months. Most recently, History Matters was updated on October 26, 2026 and Engineering Formulas on October 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.*