# Quad Calcs vs Speedometer GPX

The clearest difference is in-app purchases: Quad Calcs at none against Speedometer GPX's 1. Speedometer GPX's advantage is update cadence (every 4 days vs every 2 weeks) and iOS requirement (12.0 vs 15.8.3). On price, ads and device support there is nothing between them.

Both are free to download. Speedometer GPX sells 1 one-off in-app purchase. Quad Calcs asks for nothing beyond the download.

Quad Calcs ships an update every 2 weeks, Speedometer GPX every 4 days. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Quad Calcs | Speedometer GPX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 36 MB | 57 MB |
| Requires iOS | 15.8.3 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Land Analysis Lab](https://appshunter.io/developer/1792359337) |

## What reviewers say

### Quad Calcs

[App page](https://appshunter.io/ios/app/quad-calcs/id6741951453)

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

**In-app purchases:** none


### Speedometer GPX

[App page](https://appshunter.io/ios/app/speedometer-gpx/id6744069742)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $6.99 | one-time |


## Frequently asked questions

### Is Quad Calcs free?

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

### Is Speedometer GPX free?

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

### Do Quad Calcs or Speedometer GPX have ads?

Both Quad Calcs and Speedometer GPX show ads.

### Which is updated more often, Quad Calcs or Speedometer GPX?

Quad Calcs ships an update every 2 weeks, and Speedometer GPX every 4 days. Most recently, Quad Calcs was updated on October 4, 2026 and Speedometer GPX on October 8, 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.*