# ADHD Sound App vs Calibase

The clearest difference is in-app purchases: Calibase at none against ADHD Sound App's 10. Calibase also leads on ads (none vs shown) and update cadence (every 2 days vs fortnightly). On price and device support there is nothing between them.

Both are free to download. ADHD Sound App sells 9 in-app purchases, starting at $4.99 per 7 days. Calibase asks for nothing beyond the download.

ADHD Sound App ships an update fortnightly, Calibase every 2 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ADHD Sound App | Calibase |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (154 ratings)](https://appshunter.io/ios/app/adhd-sound-app/id6503135887/reviews)** | — |
| Number of ratings | **154** | — |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Subscription | — |
| Size | 83 MB | 54 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Better Sleep Rise Elite](https://appshunter.io/developer/1707143652) | [Chad Murobayashi](https://appshunter.io/developer/1696299994) |

## What reviewers say

### ADHD Sound App

[App page](https://appshunter.io/ios/app/adhd-sound-app/id6503135887)

This app uses personalized sound therapy and brain-stimulating exercises to improve focus, relaxation, and sleep. It offers an ADHD-friendly mode to help users manage distractions and enhance mental clarity naturally.

**Highlights:** Personalized sound therapy, Brain-stimulating exercises, Focus enhancement, Stress reduction, Deeper sleep promotion, ADHD-friendly mode

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mellow Premium | $4.99 | per 7 days |
| Mellow Premium | $4.99 | per 7 days |
| Mellow Premium | $9.99 | per month |
| Mellow Premium | $24.99 | per year |
| Mellow Premium | $24.99 | per year |
| Mellow Premium | $24.99 | per year |
| Mellow Premium | $39.99 | per year |
| ADHD Sound Premium | $47.99 | per year |
| UniSleep Premium Lifetime | $59.99 | one-time |


### Calibase

[App page](https://appshunter.io/ios/app/calibase/id6778056294)

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

**In-app purchases:** none


## Frequently asked questions

### Is ADHD Sound App free?

ADHD Sound App is free to download, with in-app purchases available.

### Is Calibase free?

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

### Do ADHD Sound App or Calibase have ads?

ADHD Sound App shows ads; Calibase does not.

### Which is updated more often, ADHD Sound App or Calibase?

ADHD Sound App ships an update fortnightly, and Calibase every 2 days. Most recently, ADHD Sound App was updated on November 12, 2026 and Calibase on October 31, 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.*