# RLM vs SkyCheck

The clearest difference is iOS requirement: RLM at 15.0 against SkyCheck's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. RLM sells 1 one-off in-app purchase and SkyCheck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

RLM ships an update every 3 weeks, SkyCheck every 2 weeks. Both last shipped on September 30, 2026.

## The numbers

| Metric | RLM | SkyCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rlm-flight/id6448285133/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 21 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [R.L.M. Software](https://appshunter.io/developer/289639238) | [Type1Aviation LLC](https://appshunter.io/developer/1433095808) |

## What reviewers say

### RLM

[App page](https://appshunter.io/ios/app/rlm-flight/id6448285133)

This aviation computer app offers a comprehensive suite of tools for pilots. It calculates various flight parameters, including altitude, airspeed, ground speed, wind components, and weight & balance. The app also features unit and currency conversions, making it a versatile utility for aviation professionals.

**Highlights:** Altitude & Cloud Base Calculations, Airspeed & Ground Speed Calculations, Wind Component & Correction Tools, Weight & Balance Calculations, Unit & Currency Conversion, Holding Pattern & Flight Plan Tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Full Access | $9.99 | one-time |


### SkyCheck

[App page](https://appshunter.io/ios/app/skycheck/id6748093547)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $7.99 | one-time |


## Frequently asked questions

### Is RLM free?

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

### Is SkyCheck free?

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

### Do RLM or SkyCheck have ads?

Neither RLM nor SkyCheck shows ads.

### Which is updated more often, RLM or SkyCheck?

RLM ships an update every 3 weeks, and SkyCheck every 2 weeks. Most recently, RLM was updated on September 30, 2026 and SkyCheck on September 30, 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.*