Underwave Training vs Inner Island
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Underwave Training
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Train breathing, breath holds, and mental control with the Underwave Method — trusted by elite ocean athletes.
Inner Island
This app offers a simple, guided breathing practice designed to promote relaxation and inner calm. It uses an extended exhale technique and visualizes your progress as your personal island grows with each completed session. Unlock new content and enjoy ambient soundscapes for a deeper sense of peace.
- Simple breathing timer
- Visual island growth
- Unlock new chapters and visuals
- Ambient soundscapes
- CBT-based relaxation method
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Inner Island is a simple, proven breathing practice that helps you relax, reset, and grow calm. Built on CBT’s most powerful relaxation method - the extended exhale. Inner Island turns your daily breathing sessions into a journey: each day, your island grows as your calm deepens. Features: • Simple breathing timer for your daily calm practice (1,3,5,7 minutes) • Watch your island and character grow with every session • Unlock new chapters, visuals, and peaceful environments • Ambient soundscapes crafted for calm • Built on CBT’s most proven relaxation method Start your journey today - your island awaits.
Screenshots
Verdict
The clearest difference is in-app purchases: Underwave Training at none against Inner Island's 1. Underwave Training also leads on iOS requirement (13.0 vs 15.1). Inner Island's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Inner Island sells 1 in-app purchase, starting at $0.99 per month. Underwave Training asks for nothing beyond the download.
Underwave Training ships an update every 3 weeks, Inner Island every 4 days. The most recent releases landed on September 19, 2026 and October 2, 2026 respectively.
| Parameter | Underwave Training | Inner Island |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 30 MB | 277 MB |
| Age rating | 4+ | 4+ |
| Developer | Augusto Carrara | Niv Rakocz |
In-app purchases
Underwave Training
No in-app purchases
Inner Island
- Inner Island Premium3 Days trial$0.991 Month
Questions
Is Underwave Training free?
Is Inner Island free?
Do Underwave Training or Inner Island have ads?
Which is updated more often, Underwave Training or Inner Island?
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