Comparison

Annalemma vs Solius

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Annalemma

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
Read full description

Your body has been giving you signals all along. The Annalemma Frame makes them visible. How it works After a workout, sauna, or any sweat session, press an Annalemma Frame to your skin. Reactive inks shift color in response to markers in your sweat. Open the app and scan your Frame. In about thirty seconds, your Read shows you what the Frame captured. No needles. No waiting. Your Read Each scan gives you a simple view of what your sweat is showing — including hydration, minerals, electrolytes, and pH — alongside general wellness guidance you can use to decide what to try next. One Frame captures one moment. Over time, your Reads help you build a personal baseline and see how your patterns change. Track your training Connect your Polar heart-rate strap or Apple Watch to follow your heart rate, zones, and time in each zone during a workout — even when your screen is locked. After your session, bring your workout and Read together to explore what to try next: hydration, fuel, recovery, or training. Choose a goal Paddle out stronger. Get dive-trip ready. Prep for a trail run. Build strength. Choose what you want to work toward and Annalemma helps you turn it into something you can practice day by day. Today's workout adapts to your goal. Your Journal lets you capture what you did, add photos, and record how you felt. When you use a Frame, your Read connects to that session so you can compare what your body showed with what you experienced. Learn what works for you Over time, Annalemma helps you notice patterns across your training, recovery, and Reads. See what changes when you train differently. When you recover differently. When you change what you drink or eat. Learn what seems to work for you — and what doesn't. A Frame captures your moment. Frames together tell your story. Share the experience Turn your workouts into Reels you can share with friends and your community. You choose the goal. Annalemma helps you learn what works for your body as you work toward it. Annalemma is for general wellness and educational purposes only. It is not a medical device and does not diagnose, treat, cure, or prevent any disease or medical condition. Annalemma insights are not a substitute for professional medical advice. Consult a qualified healthcare professional regarding medical questions or decisions.

About

Solius

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
Read full description

A smarter, safer way to stimulate the UVB health benefits of the sun is finally here. Solius is the only FDA-cleared over-the-counter UVB light therapy device that analyzes your unique skin tone to deliver a precise, optimal dose of UVB light, activating the natural health benefits of the sun with less than 1% of the total UV risk. The Solius app pairs with a Solius device, which is required for use and is sold separately at solius.com. PERSONALIZED DOSING FOR YOUR SKIN Solius scans your skin with a built-in sensor and automatically calculates a dose designed for your unique tone, so every session delivers an optimal dose of UVB light therapy. FDA-CLEARED, NO PRESCRIPTION NEEDED Solius is the only UVB light therapy device cleared by the FDA for over-the-counter use, reviewed under the Class II medical device pathway for safety, performance, and quality. APPROXIMATELY FIVE MINUTES, ONCE A WEEK A single short session, once per week, is designed to maintain the UVB light-driven benefits your body relies on year round, regardless of season, weather, or where you live. GUIDED SESSION FLOW Step-by-step in-app guidance walks you through positioning, session length, and safety checks to ensure you get the full benefit of each dose without guesswork. STREAKS AND WEEKLY REMINDERS Smart reminders nudge you when it's time for your next dose. Weekly streaks and progress views help consistency turn into results and whole body benefits. THERAPY HISTORY AND TRENDS Review every session at a glance: date, duration, dose, and therapy timespan. SAFETY The Solius dosing sensor calculates an optimal safe dose. A full year of weekly Solius therapy adds up to less total UV than about five minutes of natural midday sun. HOW IT WORKS 1. Download the Solius app and create an account, allowing you to pair with your Bluetooth® connected Solius device to complete set up and control your device. 2. Set up anytime, anywhere: Solius is easy to set up, no mounting or installation required. 3. Personalize your dose: The Solius app guides you through smart skin analysis to calculate your optimal dose. 4. Repeat therapy weekly: Use Solius for approximately five minutes a week to maximize year-round benefits. INDICATION FOR USE Solius is an over-the-counter (OTC) light panel intended to stimulate production of Vitamin D in people 22 years and older. CONTRAINDICATIONS FOR USE Do not use Solius if: - You have a history of underlying photosensitivity. - You currently use any of the following photosensitizing medications orally or topically on the therapy area (back of torso from waist to neck): anti-convulsant, amiodarone, doxycycline, hydrochlorothiazide, methotrexate, naproxen, sulfa antibiotics, tetracycline, or tretinoin. - You have been or become diagnosed with sensitivity or allergies to light affecting your skin, including but not limited to: actinic prurigo, chronic actinic dermatitis, lupus erythematosus, photodermatitis, polymorphous light eruption, protoporphyria, solar urticaria, UV-sensitive syndrome, vitiligo, or xeroderma pigmentosum. DISCLAIMER Solius is clinically proven to stimulate the production of vitamin D. References to the benefits of sunlight, UVB light, and vitamin D are based upon published, peer-reviewed research. The Solius device is not intended to diagnose, treat, cure, or prevent disease, except for the indications for use described in the user manual for your applicable region. Solius does not provide specific medical advice to users. Users should seek advice from a qualified physician or healthcare provider. This app does not establish a doctor-patient relationship. For detailed product information please consult the User Manual prior to use. Have questions? We’re here to help. Email us at support@solius.com. Privacy Policy: solius.com/legal/privacy-policy

Screenshots

Annalemma4 screens
Solius4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Annalemma versus Solius: the parameters behind the verdict, then further details
ParameterAnnalemmaSolius
PriceFreeFree
Rating4.9 (7 ratings)5.0 (70 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings770 — better
Update frequencyEvery 5 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS16.0 — better17.0
Further details — not scored
Size90 MB237 MB
Age rating4+4+
DeveloperAnnalemma LabsSolius Labs, Inc.

Customer experience

Annalemma

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Solius

All ratings70 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews31 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Annalemma

No in-app purchases

None

Solius

No in-app purchases

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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