# Annalemma vs Solius

The clearest difference is update cadence: Annalemma at every 5 days against Solius's every 3 weeks. Solius's advantage is ratings volume (70 vs 7). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for Annalemma against 5.0 for Solius. That said, the two scores are not equally well evidenced: Solius has 70 ratings behind it against 7, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Annalemma ships an update every 5 days, Solius every 3 weeks. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Annalemma | Solius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/annalemma/id6755202397/reviews) | **[5.0 (70 ratings)](https://appshunter.io/ios/app/solius/id6762333424/reviews)** |
| Number of ratings | 7 | **70** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 90 MB | 237 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Annalemma Labs](https://appshunter.io/developer/1852560626) | [Solius Labs, Inc.](https://appshunter.io/developer/1314011843) |

## What reviewers say

### Annalemma

[App page](https://appshunter.io/ios/app/annalemma/id6755202397)

This app analyzes your sweat chemistry using a special sheet and your phone's camera to reveal your body's real-time needs. It provides personalized guidance on hydration, electrolytes, and recovery to help you optimize your performance and well-being.

**Highlights:** Real-time sweat chemistry analysis, Personalized hydration and electrolyte guidance, Recovery needs assessment, Session tracking with photos and context, Progress monitoring over time, Exportable journey reels

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

**In-app purchases:** none


### Solius

[App page](https://appshunter.io/ios/app/solius/id6762333424)

This app pairs with a UVB light therapy device to deliver personalized doses of UVB light based on your skin tone. It offers guided sessions, reminders, and progress tracking for year-round health benefits. The device is FDA-cleared and requires no prescription.

**Highlights:** Personalized UVB dosing based on skin tone, FDA-cleared over-the-counter device, Short weekly sessions (approx. 5 minutes), Guided session setup and safety checks, Weekly reminders and progress tracking, Therapy history and trends

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

**In-app purchases:** none


## Frequently asked questions

### Is Annalemma free?

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

### Is Solius free?

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

### Which has better reviews, Annalemma or Solius?

Solius is rated higher. Annalemma averages 4.9 out of 5 from 7 ratings, while Solius averages 5.0 from 70 ratings.

### Do Annalemma or Solius have ads?

Neither Annalemma nor Solius shows ads.

### Which is updated more often, Annalemma or Solius?

Annalemma ships an update every 5 days, and Solius every 3 weeks. Most recently, Annalemma was updated on October 11, 2026 and Solius on October 18, 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.*