# GroundRollCalc vs FlightTimer26

The clearest difference is in-app purchases: FlightTimer26 at none against GroundRollCalc's 3. GroundRollCalc's advantage is update cadence (every 5 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GroundRollCalc sells 3 in-app purchases, starting at $0.99 per month. FlightTimer26 asks for nothing beyond the download.

GroundRollCalc ships an update every 5 days, FlightTimer26 every 5 weeks. The most recent releases landed on September 11, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | GroundRollCalc | FlightTimer26 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 weeks |
| Size | 185 MB | 10 MB |
| Requires iOS | 18.5 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rob Honeycutt](https://appshunter.io/developer/1820512480) | [Christian Heim](https://appshunter.io/developer/1473781396) |

## What reviewers say

### GroundRollCalc

[App page](https://appshunter.io/ios/app/groundrollcalc/id6747908402)

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GroundRollCalc Pro Monthly | $0.99 | per month |
| GroundRollCalc Pro Yearly | $9.99 | per year |
| Unlock Live GPS | $5.99 | one-time |


### FlightTimer26

[App page](https://appshunter.io/ios/app/flighttimer26/id6751437556)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GroundRollCalc free?

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

### Is FlightTimer26 free?

FlightTimer26 is free to download, with no in-app purchases.

### Do GroundRollCalc or FlightTimer26 have ads?

Neither GroundRollCalc nor FlightTimer26 shows ads.

### Which is updated more often, GroundRollCalc or FlightTimer26?

GroundRollCalc ships an update every 5 days, and FlightTimer26 every 5 weeks. Most recently, GroundRollCalc was updated on September 11, 2026 and FlightTimer26 on September 22, 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.*