# SUND vs Nerveli App

The clearest difference is in-app purchases: Nerveli App at none against SUND's 2. Nerveli App also leads on update cadence (weekly vs every 3 weeks) and ratings volume (7 vs 2). SUND's advantage is iOS requirement (13.0 vs 15.5). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. SUND sells 2 in-app purchases, starting at $1.99 per month. Nerveli App asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SUND against 5.0 for Nerveli App. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

SUND ships an update every 3 weeks, Nerveli App weekly. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | SUND | Nerveli App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/sund/id1568238194/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/nerveli-app/id6739637214/reviews) |
| Number of ratings | 2 | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Freemium | **Free** |
| Size | 20 MB | 187 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Colin Macintosh](https://appshunter.io/developer/1523864917) | [Unicode LLC](https://appshunter.io/developer/1502353210) |

## What reviewers say

### SUND

[App page](https://appshunter.io/ios/app/sund/id1568238194)

This app provides a tranquil experience through gentle vibrations and calming audio. It's designed to help users relax and find a sense of peace. Enjoy a soothing escape from daily stress.

**Highlights:** Emits vibration, Plays soothing sounds, Promotes relaxation, Offers a calming experience, Designed for stress relief

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month subscription | $1.99 | per month |
| One year subscription | $19.99 | per year |


### Nerveli App

[App page](https://appshunter.io/ios/app/nerveli-app/id6739637214)

This science-based wellness app helps individuals manage chronic pain by tracking symptoms and lifestyle factors. It uses AI to identify patterns between pain, sleep, stress, and daily habits, offering educational content and coping tools.

**Highlights:** Body Map pain tracking, AI-assisted pattern insights, Science-informed approach, Educational library on pain management, CBT and mindfulness tools, Personalized guidance

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

**In-app purchases:** none


## Frequently asked questions

### Is SUND free?

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

### Is Nerveli App free?

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

### Which has better reviews, SUND or Nerveli App?

SUND and Nerveli App are both rated 5.0 out of 5 on the App Store, from 2 and 7 ratings respectively.

### Do SUND or Nerveli App have ads?

Neither SUND nor Nerveli App shows ads.

### Which is updated more often, SUND or Nerveli App?

SUND ships an update every 3 weeks, and Nerveli App weekly. Most recently, SUND was updated on June 1, 2026 and Nerveli App on September 17, 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.*