# Avent7 CheckFlow vs Unterra

The clearest difference is in-app purchases: Avent7 CheckFlow at none against Unterra's 1. Avent7 CheckFlow also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). Unterra's advantage is update cadence (every 4 days vs every 4 weeks). On price and ads there is nothing between them.

Both are free to download. Unterra sells 1 in-app purchase, starting at $6.99 per year. Avent7 CheckFlow asks for nothing beyond the download.

Avent7 CheckFlow ships an update every 4 weeks, Unterra every 4 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Avent7 CheckFlow | Unterra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/unterra/id6780282962/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 37 MB | 58 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [AVENT7 EVENTOS E VIAGENS LTDA](https://appshunter.io/developer/1787035494) | [NPDesigned LLC](https://appshunter.io/developer/1659684889) |

## What reviewers say

### Avent7 CheckFlow

[App page](https://appshunter.io/ios/app/avent7-checkflow/id6773107346)

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

**In-app purchases:** none


### Unterra

[App page](https://appshunter.io/ios/app/unterra/id6780282962)

This app creates a personal map of your real-world travels, revealing fog as you explore new streets, cities, and countries. Track your progress, earn badges for milestones, and customize your exploration experience.

**Highlights:** Personalized exploration map, Fog reveals as you travel, Tracks roads, cities, states, and countries, Earn badges for exploration milestones, Customizable reveal radius, Metric and imperial units

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NewRoads Pro | $6.99 | per year |


## Frequently asked questions

### Is Avent7 CheckFlow free?

Avent7 CheckFlow is free to download, with no in-app purchases.

### Is Unterra free?

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

### Do Avent7 CheckFlow or Unterra have ads?

Neither Avent7 CheckFlow nor Unterra shows ads.

### Which is updated more often, Avent7 CheckFlow or Unterra?

Avent7 CheckFlow ships an update every 4 weeks, and Unterra every 4 days. Most recently, Avent7 CheckFlow was updated on October 25, 2026 and Unterra 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.*