# Sea Hero Quest vs Nerva

The clearest difference is monetization model: Sea Hero Quest at free against Nerva's free with in-app purchases. Sea Hero Quest also leads on review sentiment (94% vs 73%). Nerva's advantage is update cadence (weekly vs monthly) and chart position (#196 vs unranked). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Sea Hero Quest sells 1 in-app purchase, starting at $7.99 per month and Nerva sells 4 in-app purchases, starting at $99.00 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for Sea Hero Quest against 4.7 for Nerva. Both are backed by a comparable volume of ratings — 3.1K and 15K respectively. Written reviews are what separate them: 94% of Sea Hero Quest's written reviews are positive against 73% of Nerva's.

Sea Hero Quest ships an update monthly, Nerva weekly. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Sea Hero Quest | Nerva |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (3.1K ratings)](https://appshunter.io/ios/app/sea-hero-quest/id1034383306/reviews) | **[4.7 (15K ratings)](https://appshunter.io/ios/app/nerva-gut-brain-program/id1467398796/reviews)** |
| Number of ratings | 3.1K | **15K** |
| Positive reviews | **93.7% of reviews** | 72.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#196** |
| Size | 170 MB | 139 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +12 |
| Developer | [GLITCHERS LTD](https://appshunter.io/developer/719039640) | [Mindset Health Pty Ltd](https://appshunter.io/developer/1255073245) |

## What reviewers say

### Sea Hero Quest

[App page](https://appshunter.io/ios/app/sea-hero-quest/id1034383306)

This game uses your gameplay to measure spatial navigation skills. The data collected helps researchers understand cognitive decline and brain health.

**Highlights:** Game-based brain health testing, Measures spatial navigation ability, Helps detect cognitive decline, Contributes to scientific research, Play to improve brain health understanding

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Subscription | $7.99 | per month |

**What reviewers like**

- 🚀 Fun and challenging
- 👍 Helps with important research
- 💡 Unique concept
- 🚀 Engaging gameplay
- 👍 Cute and polished graphics

**What reviewers complain about**

- 🐛 Unresponsive controls
- 🐛 Difficulty in steering the boat
- 🐛 Glitches and crashes
- 🐛 Lack of clear instructions
- 🐛 Motion sickness issues

**Reported bugs**

- Levels not loading properly
- Entire screen turning pink
- Boat not responding to user input

**Requested features**

- More game modes and levels
- Ability to adjust volume
- Clearer instructions on game mechanics
- Improved boat controls and responsiveness
- Customization options for the boat


### Nerva

[App page](https://appshunter.io/ios/app/nerva-gut-brain-program/id1467398796)

**Currently charting:** #196 Top Grossing · Health & Fitness (US App Store)

This program helps manage gut-brain disorders like IBS and bloating by retraining the nervous system. It offers daily sessions, practical tools, and personalized guidance to improve digestive comfort and reduce symptoms.

**Highlights:** Daily 15-minute retraining sessions, Flare-up tools for specific symptoms, Long-term maintenance plan, AI-driven personalization, Evidence-based gut-brain techniques

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nerva IBS program (Monthly) | $99.00 | per month |
| Nerva IBS program (3 Month) | $149.00 | per 3 months |
| 30% Off Nerva IBS (3 Month) | $149.00 | per 3 months |
| Nerva Full Access | $199.00 | per year |

**What reviewers like**

- 🚀 Effective for symptom reduction
- 👍 Calming and relaxing sessions
- 💡 Helpful for managing stress and anxiety
- 👍 Positive affirmations and education
- 🚀 Quick improvements seen by some users

**What reviewers complain about**

- 🔁 Repetitive nature of sessions
- 💰 Expensive subscription cost
- 🔍 Lack of customization options
- 🐛 Technical issues with app functionality

**Reported bugs**

- App getting stuck on certain days
- Difficulty accessing previous sessions
- Inconsistent user experience across devices

**Requested features**

- More variety in guided visualizations
- Ability to skip or replace certain sessions
- Maintenance plan with reduced pricing
- Offline access to recordings


## Frequently asked questions

### Is Sea Hero Quest free?

Sea Hero Quest is free to download, with in-app purchases available.

### Is Nerva free?

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

### Which has better reviews, Sea Hero Quest or Nerva?

Nerva is rated higher. Sea Hero Quest averages 4.6 out of 5 from 3.1K ratings, while Nerva averages 4.7 from 15K ratings.

### Do Sea Hero Quest or Nerva have ads?

Neither Sea Hero Quest nor Nerva shows ads.

### Which is updated more often, Sea Hero Quest or Nerva?

Sea Hero Quest ships an update monthly, and Nerva weekly. Most recently, Sea Hero Quest was updated on November 2, 2026 and Nerva on November 6, 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.*