# Tether vs Duna's AI Scanner

The clearest difference is in-app purchases: Duna's AI Scanner at none against Tether's 7. Duna's AI Scanner also leads on update cadence (daily vs every 10 days). Tether's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Tether sells 7 in-app purchases, starting at $5.49 per month. Duna's AI Scanner asks for nothing beyond the download.

Tether ships an update every 10 days, Duna's AI Scanner daily. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Tether | Duna's AI Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/tether-focus-and-accountability/id6754545887/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 44 MB | 7 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Undrift LLC](https://appshunter.io/developer/1848781331) | [Nam Vu Hoai](https://appshunter.io/developer/1886460444) |

## What reviewers say

### Tether

[App page](https://appshunter.io/ios/app/tether-focus-and-accountability/id6754545887)

This app helps you break free from excessive screen time by introducing friction to app usage. It allows you to block apps, websites, and categories with customizable difficulty levels for ending sessions, promoting stronger phone habits.

**Highlights:** App and website blocking, Customizable session difficulty, Focus modes (indefinite, countdown, Pomodoro), Scheduled sessions, Reusable blocklists, Strict Mode to prevent loopholes, Live Activity and Dynamic Island integration

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tether Pro Monthly Member | $5.49 | per month |
| Tether Pro Free Trial | $6.99 | per month |
| Tether Pro Monthly | $6.99 | per month |
| Tether Pro Yearly Member | $24.49 | per year |
| Tether Pro Yearly | $34.99 | per year |
| Tether Pro Lifetime Member | $79.99 | one-time |
| Tether Pro Lifetime | $99.99 | one-time |


### Duna's AI Scanner

[App page](https://appshunter.io/ios/app/dunas-ai-scanner/id6770083068)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tether free?

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

### Is Duna's AI Scanner free?

Duna's AI Scanner is free to download, with no in-app purchases.

### Do Tether or Duna's AI Scanner have ads?

Duna's AI Scanner shows ads; Tether does not.

### Which is updated more often, Tether or Duna's AI Scanner?

Tether ships an update every 10 days, and Duna's AI Scanner daily. Most recently, Tether was updated on October 30, 2026 and Duna's AI Scanner on November 5, 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.*