# CO2IN vs Trypup

The clearest difference is in-app purchases: CO2IN at none against Trypup's 10. CO2IN also leads on device support (3 vs 1). Trypup's advantage is update cadence (every 6 days vs every 2 months). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Trypup sells 10 one-off in-app purchases. CO2IN asks for nothing beyond the download.

CO2IN ships an update every 2 months, Trypup every 6 days. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | CO2IN | Trypup |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Size | 74 MB | 68 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [The CO2IN, a.s.](https://appshunter.io/developer/1580951797) | [OndysLab s.r.o.](https://appshunter.io/developer/6775990137) |

## What reviewers say

### CO2IN

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

**Features:** Vision Pro support

**In-app purchases:** none


### Trypup

[App page](https://appshunter.io/ios/app/trypup-try-a-dog-first/id6775990135)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Siberian Husky | $1.99 | one-time |
| Chihuahua | $1.99 | one-time |
| German Shepherd | $1.99 | one-time |
| Golden Retriever | $1.99 | one-time |
| French Bulldog | $1.99 | one-time |
| Jack Russell Terrier | $1.99 | one-time |
| Yorkshire Terrier | $1.99 | one-time |
| Bernese Mountain Dog | $1.99 | one-time |
| American Pit Bull Terrier | $1.99 | one-time |
| All breeds | $9.99 | one-time |


## Frequently asked questions

### Is CO2IN free?

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

### Is Trypup free?

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

### Do CO2IN or Trypup have ads?

Neither CO2IN nor Trypup shows ads.

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

CO2IN ships an update every 2 months, and Trypup every 6 days. Most recently, CO2IN was updated on November 11, 2026 and Trypup on November 10, 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.*