# SOLTEC vs Centropix

The clearest difference is rating: SOLTEC at 4.2 against Centropix's 3.6. SOLTEC also leads on review sentiment (50% vs 40%). Centropix's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SOLTEC holds the better App Store score, 4.2 against 3.6. Both are backed by a comparable volume of ratings — 6 and 22 respectively. Written reviews point the same way: 50% of SOLTEC's written reviews are positive against 40% of Centropix's.

SOLTEC ships an update every 2 weeks, Centropix every 3 weeks. The most recent releases landed on October 9, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | SOLTEC | Centropix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (6 ratings)](https://appshunter.io/ios/app/soltecz/id1508060664/reviews)** | [3.6 (22 ratings)](https://appshunter.io/ios/app/centropix/id1559927254/reviews) |
| Number of ratings | 6 | **22** |
| Positive reviews | **50.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 38 MB | 256 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Round River Research Corporation](https://appshunter.io/developer/1508060663) | [Centropix USA LLc](https://appshunter.io/developer/1559927466) |

## What reviewers say

### SOLTEC

[App page](https://appshunter.io/ios/app/soltecz/id1508060664)

This app analyzes your sleep cycles to help you regain Delta sleep and improve overall sleep quality. It also offers relaxation sessions for stress relief during the day. Track your progress and observe improvements with system use.

**Highlights:** Sleep cycle analysis, Delta sleep improvement, Z•TRACK™ Analyst, Relaxation sessions, Stress relief, Progress tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Centropix

[App page](https://appshunter.io/ios/app/centropix/id1559927254)

This app enhances your self-care routine by controlling wireless wellness devices. It offers five distinct programs with adjustable intensities for relaxation, balance, energy, synchronization, and transformation.

**Highlights:** Control KLOUD and BUBBLE devices, Five revolutionary programs, Adjustable intensity levels, Wireless PEMA applicators, Frequency wearable integration, Uncomplicated wellness experience

**In-app purchases:** none


## Frequently asked questions

### Is SOLTEC free?

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

### Is Centropix free?

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

### Which has better reviews, SOLTEC or Centropix?

SOLTEC is rated higher. SOLTEC averages 4.2 out of 5 from 6 ratings, while Centropix averages 3.6 from 22 ratings.

### Do SOLTEC or Centropix have ads?

SOLTEC shows ads; Centropix does not.

### Which is updated more often, SOLTEC or Centropix?

SOLTEC ships an update every 2 weeks, and Centropix every 3 weeks. Most recently, SOLTEC was updated on October 9, 2026 and Centropix on September 27, 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.*