# API 510 Highlights Practices vs PreHeat

The clearest difference is in-app purchases: API 510 Highlights Practices at none against PreHeat's 1. API 510 Highlights Practices also leads on iOS requirement (9.1 vs 13.0). PreHeat's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. PreHeat sells 1 one-off in-app purchase. API 510 Highlights Practices asks for nothing beyond the download.

API 510 Highlights Practices ships an update every 2 months, PreHeat fortnightly. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | API 510 Highlights Practices | PreHeat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 16 MB | 4 MB |
| Requires iOS | **9.1** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Nguyen Hieu](https://appshunter.io/developer/1323491316) | [Shabbir Ahmed](https://appshunter.io/developer/1083166021) |

## What reviewers say

### API 510 Highlights Practices

[App page](https://appshunter.io/ios/app/api-510-highlights-practices/id1362433334)

**Features:** macOS Compatibility

**In-app purchases:** none


### PreHeat

[App page](https://appshunter.io/ios/app/preheat/id6461216985)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Non Consumable Subscription | $3.99 | one-time |


## Frequently asked questions

### Is API 510 Highlights Practices free?

API 510 Highlights Practices is free to download, with no in-app purchases.

### Is PreHeat free?

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

### Do API 510 Highlights Practices or PreHeat have ads?

Neither API 510 Highlights Practices nor PreHeat shows ads.

### Which is updated more often, API 510 Highlights Practices or PreHeat?

API 510 Highlights Practices ships an update every 2 months, and PreHeat fortnightly. Most recently, API 510 Highlights Practices was updated on October 1, 2026 and PreHeat on October 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.*