# Troodon OBD vs Countdowns AI Plus

The clearest difference is in-app purchases: Troodon OBD at none against Countdowns AI Plus's 5. Troodon OBD also leads on iOS requirement (15.0 vs 17.0). Countdowns AI Plus's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Countdowns AI Plus sells 5 in-app purchases, starting at $2.99 per month. Troodon OBD asks for nothing beyond the download.

Troodon OBD ships an update every 3 weeks, Countdowns AI Plus every 2 days. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Troodon OBD | Countdowns AI Plus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 27 MB | 54 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [DevCom spol. s r.o.](https://appshunter.io/developer/1725153456) | [amir hayek](https://appshunter.io/developer/845110506) |

## What reviewers say

### Troodon OBD

[App page](https://appshunter.io/ios/app/troodon-obd/id6475777811)

**Features:** macOS Compatibility

**In-app purchases:** none


### Countdowns AI Plus

[App page](https://appshunter.io/ios/app/countdowns-ai-plus/id6801441458)

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Any Countdown Plus (Monthly) | $2.99 | per month |
| Any Countdown Plus (Annual) | $19.99 | per year |
| 5 Countdowns | $4.99 | one-time |
| 12 Countdowns | $9.99 | one-time |
| 30 Countdowns | $19.99 | one-time |


## Frequently asked questions

### Is Troodon OBD free?

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

### Is Countdowns AI Plus free?

Countdowns AI Plus is free to download, with in-app purchases available.

### Do Troodon OBD or Countdowns AI Plus have ads?

Neither Troodon OBD nor Countdowns AI Plus shows ads.

### Which is updated more often, Troodon OBD or Countdowns AI Plus?

Troodon OBD ships an update every 3 weeks, and Countdowns AI Plus every 2 days. Most recently, Troodon OBD was updated on October 1, 2026 and Countdowns AI Plus 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.*