# Aircraft Perf Calculator vs WingLog ULM

The clearest difference is price: WingLog ULM at Free against Aircraft Perf Calculator's $1.99. WingLog ULM also leads on update cadence (every 3 weeks vs every 5 months). Aircraft Perf Calculator's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.0). On ads and device support there is nothing between them.

WingLog ULM is free to download; Aircraft Perf Calculator costs $1.99 up front. WingLog ULM sells 2 in-app purchases, starting at $3.99 per month. Aircraft Perf Calculator asks for nothing beyond the download.

Aircraft Perf Calculator ships an update every 5 months, WingLog ULM every 3 weeks. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Aircraft Perf Calculator | WingLog ULM |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 14 MB | 28 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [amenai technologies](https://appshunter.io/developer/1699434028) | [Giulio Fontana](https://appshunter.io/developer/1871597288) |

## What reviewers say

### Aircraft Perf Calculator

[App page](https://appshunter.io/ios/app/aircraft-perf-calculator/id6541753665)

This app provides real-time performance calculations for pilots, converting takeoff numbers into instant readouts. It automatically computes adjusted takeoff distance, corrected climb rate, and runway usage based on current altitude and temperature, eliminating the need for paper charts.

**Highlights:** Real-time performance calculations, Adjusted takeoff distance, Corrected climb rate, Runway usage percentage, Density altitude calculation, Comprehensive airfield database, Geolocation and real-time weather

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

**In-app purchases:** none


### WingLog ULM

[App page](https://appshunter.io/ios/app/winglog-ulm/id6774974451)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Monthly Plan | $3.99 | per month |
| PRO Annual Plan | $24.99 | per year |


## Frequently asked questions

### Is Aircraft Perf Calculator free?

Aircraft Perf Calculator costs $1.99, with no in-app purchases.

### Is WingLog ULM free?

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

### Do Aircraft Perf Calculator or WingLog ULM have ads?

Neither Aircraft Perf Calculator nor WingLog ULM shows ads.

### Which is updated more often, Aircraft Perf Calculator or WingLog ULM?

Aircraft Perf Calculator ships an update every 5 months, and WingLog ULM every 3 weeks. Most recently, Aircraft Perf Calculator was updated on October 9, 2026 and WingLog ULM on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*