# GreenTrax vs KeepDates

The clearest difference is update cadence: KeepDates at every 10 days against GreenTrax's every 5 weeks. GreenTrax's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. GreenTrax sells 4 one-off in-app purchases and KeepDates sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

GreenTrax ships an update every 5 weeks, KeepDates every 10 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | GreenTrax | KeepDates |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/greentrax/id6742363398/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 12 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Brian Buck](https://appshunter.io/developer/999869732) | [Ziga Dolar](https://appshunter.io/developer/564399117) |

## What reviewers say

### GreenTrax

[App page](https://appshunter.io/ios/app/greentrax/id6742363398)

This app records your human-powered journeys, calculating your carbon footprint reduction. It visualizes your progress with charts and savings equivalents, and can import commute data from Strava.

**Highlights:** Tracks human-powered commutes, Calculates carbon savings, Displays savings equivalencies, Visualizes data with charts, Strava read-only import

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nice Donation | $0.99 | one-time |
| Big Donation | $4.99 | one-time |
| Generous Donation | $9.99 | one-time |
| Supporter Donation | $19.99 | one-time |


### KeepDates

[App page](https://appshunter.io/ios/app/keepdates-contact-dates/id6761375469)

**Features:** Apple Watch app, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $3.99 | one-time |


## Frequently asked questions

### Is GreenTrax free?

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

### Is KeepDates free?

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

### Do GreenTrax or KeepDates have ads?

Neither GreenTrax nor KeepDates shows ads.

### Which is updated more often, GreenTrax or KeepDates?

GreenTrax ships an update every 5 weeks, and KeepDates every 10 days. Most recently, GreenTrax was updated on October 28, 2026 and KeepDates 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.*