# RILEM vs Apel

The clearest difference is update cadence: Apel at monthly against RILEM's every 9 months. RILEM's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RILEM ships an update every 9 months, Apel monthly. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RILEM | Apel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Size | 6 MB | 115 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RILEM Publications](https://appshunter.io/developer/1478599497) | [Whaller](https://appshunter.io/developer/860673959) |

## What reviewers say

### RILEM

[App page](https://appshunter.io/ios/app/rilem/id1258497395)

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

**In-app purchases:** none


### Apel

[App page](https://appshunter.io/ios/app/apel/id6737984487)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RILEM free?

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

### Is Apel free?

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

### Do RILEM or Apel have ads?

Neither RILEM nor Apel shows ads.

### Which is updated more often, RILEM or Apel?

RILEM ships an update every 9 months, and Apel monthly. Most recently, RILEM was updated on October 5, 2026 and Apel on October 7, 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.*