# SurfaceOps by uAvionix vs MachCrit Pilot Logbook

The clearest difference is in-app purchases: SurfaceOps by uAvionix at none against MachCrit Pilot Logbook's 2. SurfaceOps by uAvionix also leads on iOS requirement (15.0 vs 18.1). MachCrit Pilot Logbook's advantage is update cadence (every 3 days vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. MachCrit Pilot Logbook sells 2 in-app purchases, starting at $4.99 per month. SurfaceOps by uAvionix asks for nothing beyond the download.

SurfaceOps by uAvionix ships an update every 2 weeks, MachCrit Pilot Logbook every 3 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | SurfaceOps by uAvionix | MachCrit Pilot Logbook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 5 MB | 179 MB |
| Requires iOS | **15.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CAVU Consulting LLC](https://appshunter.io/developer/1884389605) | [Chad Clarke](https://appshunter.io/developer/1895336304) |

## What reviewers say

### SurfaceOps by uAvionix

[App page](https://appshunter.io/ios/app/surfaceops-by-uavionix/id6762227397)

**Features:** macOS Compatibility

**In-app purchases:** none


### MachCrit Pilot Logbook

[App page](https://appshunter.io/ios/app/machcrit-pilot-logbook/id6763485825)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MachCrit Pro | $4.99 | per month |
| MachCrit Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is SurfaceOps by uAvionix free?

SurfaceOps by uAvionix is free to download, with no in-app purchases.

### Is MachCrit Pilot Logbook free?

MachCrit Pilot Logbook is free to download, with in-app purchases available.

### Do SurfaceOps by uAvionix or MachCrit Pilot Logbook have ads?

Neither SurfaceOps by uAvionix nor MachCrit Pilot Logbook shows ads.

### Which is updated more often, SurfaceOps by uAvionix or MachCrit Pilot Logbook?

SurfaceOps by uAvionix ships an update every 2 weeks, and MachCrit Pilot Logbook every 3 days. Most recently, SurfaceOps by uAvionix was updated on October 28, 2026 and MachCrit Pilot Logbook on October 28, 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.*