# ZenDepth vs Spearo Apnea

The clearest difference is in-app purchases: Spearo Apnea at none against ZenDepth's 3. Spearo Apnea also leads on iOS requirement (13.0 vs 18.0). ZenDepth's advantage is update cadence (every 9 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. ZenDepth sells 3 in-app purchases, starting at $3.99 per month. Spearo Apnea asks for nothing beyond the download.

ZenDepth ships an update every 9 days, Spearo Apnea every 2 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ZenDepth | Spearo Apnea |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/zendepth/id6759767091/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 11 MB | 5 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Christos Voutsaras](https://appshunter.io/developer/1880557269) | [VISIVO](https://appshunter.io/developer/1488217029) |

## What reviewers say

### ZenDepth

[App page](https://appshunter.io/ios/app/zendepth/id6759767091)

Enhance your breath-holding capabilities with personalized training plans and guided exercises. Track progress, unlock techniques, and compete with friends in a visually immersive underwater environment.

**Highlights:** Adaptive training plans (CO2 & O2 tables), Guided stretching exercises, 20+ breath-hold techniques, Gamified milestones and badges, Social leaderboards for friends, Immersive underwater aesthetic

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Annually | $19.99 | per year |
| Lifetime | $49.99 | one-time |


### Spearo Apnea

[App page](https://appshunter.io/ios/app/spearo-apnea/id6760300574)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ZenDepth free?

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

### Is Spearo Apnea free?

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

### Do ZenDepth or Spearo Apnea have ads?

Neither ZenDepth nor Spearo Apnea shows ads.

### Which is updated more often, ZenDepth or Spearo Apnea?

ZenDepth ships an update every 9 days, and Spearo Apnea every 2 months. Most recently, ZenDepth was updated on October 24, 2026 and Spearo Apnea on October 28, 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.*