# simREF vs UniChecklist

The clearest difference is update cadence: simREF at every 10 days against UniChecklist's every 11 months. simREF also leads on iOS requirement (17.0 vs 27.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. simREF sells 2 one-off in-app purchases and UniChecklist sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

simREF ships an update every 10 days, UniChecklist every 11 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | simREF | UniChecklist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/simref/id6753267206/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 11 months |
| Monetization | Free with in-app purchases | — |
| Size | 148 MB | 1 MB |
| Requires iOS | **17.0** | 27.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Chris-Luca Fischer](https://appshunter.io/developer/1843257076) | [Hardy Bismark](https://appshunter.io/developer/1849993074) |

## What reviewers say

### simREF

[App page](https://appshunter.io/ios/app/simref/id6753267206)

This app provides quick-reference checklists and operational data for flight simulation on iPad. It features interactive normal and abnormal checklists, essential flight data, and a CG/Trim calculator for takeoff planning in a distraction-free, dark UI optimized for cockpit environments.

**Highlights:** Interactive Normal & Abnormal Checklists, Operational Data at a glance, CG/Trim calculator, Offline functionality, Dark UI for cockpit environments, iPad landscape optimized

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IndiGo Virtual Integration | $2.99 | one-time |
| simREF Full Access | $8.99 | one-time |


### UniChecklist

[App page](https://appshunter.io/ios/app/unichecklist/id6754779195)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UniChecklist | $4.99 | one-time |


## Frequently asked questions

### Is simREF free?

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

### Is UniChecklist free?

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

### Do simREF or UniChecklist have ads?

Neither simREF nor UniChecklist shows ads.

### Which is updated more often, simREF or UniChecklist?

simREF ships an update every 10 days, and UniChecklist every 11 months. Most recently, simREF was updated on October 24, 2026 and UniChecklist on October 24, 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.*