# GroundRollCalc vs Kneeboard for Pilots

The clearest difference is update cadence: GroundRollCalc at every 5 days against Kneeboard for Pilots's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. GroundRollCalc sells 3 in-app purchases, starting at $0.99 per month and Kneeboard for Pilots sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

GroundRollCalc ships an update every 5 days, Kneeboard for Pilots every 5 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | GroundRollCalc | Kneeboard for Pilots |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 weeks |
| Size | 185 MB | 7 MB |
| Requires iOS | 18.5 | **17.5** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rob Honeycutt](https://appshunter.io/developer/1820512480) | [Selcuk Dolapci](https://appshunter.io/developer/1509031121) |

## 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 |


### Kneeboard for Pilots

[App page](https://appshunter.io/ios/app/kneeboard-for-pilots/id6749446180)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kneeboard Pro | $9.99 | one-time |


## Frequently asked questions

### Is GroundRollCalc free?

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

### Is Kneeboard for Pilots free?

Kneeboard for Pilots is free to download, with in-app purchases available.

### Do GroundRollCalc or Kneeboard for Pilots have ads?

Neither GroundRollCalc nor Kneeboard for Pilots shows ads.

### Which is updated more often, GroundRollCalc or Kneeboard for Pilots?

GroundRollCalc ships an update every 5 days, and Kneeboard for Pilots every 5 weeks. Most recently, GroundRollCalc was updated on October 30, 2026 and Kneeboard for Pilots on October 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.*