# CO2IN vs Trailward

The clearest difference is in-app purchases: CO2IN at none against Trailward's 2. CO2IN also leads on ads (none vs shown). Trailward's advantage is update cadence (every 5 days vs every 2 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Trailward sells 2 in-app purchases, starting at $4.99 per month. CO2IN asks for nothing beyond the download.

CO2IN ships an update every 2 months, Trailward every 5 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CO2IN | Trailward |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 days** |
| Size | 73 MB | 22 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [The CO2IN, a.s.](https://appshunter.io/developer/1580951797) | [Stephan Schulz](https://appshunter.io/developer/437783148) |

## What reviewers say

### CO2IN

[App page](https://appshunter.io/ios/app/co2in/id1513533437)

**In-app purchases:** none


### Trailward

[App page](https://appshunter.io/ios/app/trailward-explore-anything/id6755138252)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter Monthly | $4.99 | per month |
| Supporter Yearly | $44.99 | per year |


## Frequently asked questions

### Is CO2IN free?

CO2IN is free to download, with no in-app purchases.

### Is Trailward free?

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

### Do CO2IN or Trailward have ads?

Trailward shows ads; CO2IN does not.

### Which is updated more often, CO2IN or Trailward?

CO2IN ships an update every 2 months, and Trailward every 5 days. Most recently, CO2IN was updated on October 27, 2026 and Trailward on October 25, 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.*