# King Focus vs Undertone

The clearest difference is device support: King Focus at 3 against Undertone's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. King Focus sells 1 in-app purchase, starting at $3.99 per month and Undertone sells 6 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

King Focus ships an update every 9 days, Undertone every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | King Focus | Undertone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (10 ratings)](https://appshunter.io/ios/app/undertone-therapy-notes/id6762648260/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | — | Ad-supported |
| Size | 47 MB | 81 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Zumbat Hub srl](https://appshunter.io/developer/1358104949) | [Mosaic Health Analytics Inc.](https://appshunter.io/developer/1894940266) |

## What reviewers say

### King Focus

[App page](https://appshunter.io/ios/app/king-focus-train-attention/id6761002164)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| King Focus Monthly Subscription | $3.99 | per month |


### Undertone

[App page](https://appshunter.io/ios/app/undertone-therapy-notes/id6762648260)

This app helps individuals in therapy organize and reflect on their sessions. It provides summaries of recorded or uploaded sessions, allows users to save key insights and reminders, and prepares them for future appointments by reviewing past discussions and planned topics. It aims to enhance continuity and retention of therapeutic work between sessions.

**Highlights:** Record or upload session audio, Session summaries with key themes, Save insights and reminders, Organize past sessions, Prepare for future appointments, Track homework and follow-through

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Check-in - Monthly Subscription | $8.99 | per month |
| Ongoing - Monthly Subscription | $12.99 | per month |
| Momentum - Monthly Subscription | $19.99 | per month |
| Check-in - Yearly Subscription | $69.99 | per year |
| Ongoing - Yearly Subscription | $99.99 | per year |
| Momentum - Yearly Subscription | $134.99 | per year |


## Frequently asked questions

### Is King Focus free?

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

### Is Undertone free?

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

### Do King Focus or Undertone have ads?

Neither King Focus nor Undertone shows ads.

### Which is updated more often, King Focus or Undertone?

King Focus ships an update every 9 days, and Undertone every 5 days. Most recently, King Focus was updated on October 24, 2026 and Undertone on October 24, 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.*