Project Function vs Sol Glow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Project Function
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With the Project Function App, you can check in to our facility, manage your membership details, and book appointments. - Access digital membership pass - Book appointments and view session balance - Edit personal information and view membership details - Stay up-to-date with announcements from us! Download the app today! Features connectivity to Apple Watch (synced to HealthKit app)
Sol Glow
This app helps you plan safe outdoor sun exposure based on live UV index, weather, and your skin type. It provides personalized session lengths, timers with reminders to flip, reapply sunscreen, and hydrate, all while discouraging overexposure.
- Live UV index and weather forecast
- Personalized sun exposure session planning
- Smart timer with flip and reapply reminders
- Hydration nudges
- Live Activity and widget support
- Session logging and progress tracking
- Group session sharing
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Built on the live UV index — not guesswork. Sol Glow is a sun-safety-first planner for time outside. It estimates a personalized session length from the live local UV index, the weather, your skin type, and your SPF — then runs a live timer that reminds you when to flip, reapply, and hydrate. The safest amount of UV exposure is none, so every plan is capped to discourage overexposure. Here's how it works. 1. TELL SOL GLOW ABOUT YOU A quick onboarding learns your skin type, sensitivity, and the kind of time outside you're after. You can add your sunscreens, oils, and sprays once, with their SPF and water resistance. 2. CHECK TODAY'S SUN The home screen shows the live UV index, cloud cover, and your burn risk for your location — so you know what you're walking into before you go out. 3. GET A PLAN FOR RIGHT NOW Pick your goal and Sol Glow builds a session length from real-time UV, your skin profile, and the SPF you're wearing. Every plan is capped under a personalized burn-risk threshold to discourage overexposure. 4. RUN THE LIVE TIMER Start your glow and the app counts down to each step: - Flip reminders, front and back - Reapply reminders timed to your sunscreen's SPF and water resistance - Hydration nudges - A clear "wind down" so you don't overdo it 5. GLANCE, DON'T STARE - Live Activity on the Lock Screen and Dynamic Island with your timer, UV, and reapply status - Home Screen widgets for today's UV index - Designed to be glanced at, so you can put the phone away 6. LOG IT Each session saves to a calendar with the UV, SPF, and outcome. Optional progress photos and streaks are yours to keep. Your history feeds back in to refine future plans. 7. GO TOGETHER Start a shared "beach day" session with friends, sync timers, and keep the whole group on the same flip and reapply schedule. SAFETY BY DESIGN - Outdoor sun only — Sol Glow does not support or encourage tanning beds - Plans actively discourage excessive UV exposure - SPF, reapply, and time-limit reminders throughout - Burn-risk awareness front and center GLOW UP SUBSCRIPTION Sol Glow is a subscription app. Glow Up unlocks everything — the full smart planner, the live glow timer, flip, reapply, and hydration reminders, Home Screen widgets, and shared beach-day sessions with friends. New members start with a 3-day free trial: - Glow Up Weekly: $2.99 / week - Glow Up Monthly: $4.99 / month - Glow Up Yearly: $24.99 / year Your 3-day free trial automatically converts to the plan you chose unless you cancel at least 24 hours before it ends. Payment is charged to your Apple ID, and the subscription renews automatically unless canceled at least 24 hours before the end of the current period; manage or cancel anytime in your App Store account settings. No ads. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getsolglow.com/privacy.html IMPORTANT Sol Glow provides general sun-safety guidance for outdoor sun. It is not medical advice and does not guarantee any tanning result. The safest level of UV exposure is none — always follow your sunscreen's directions, cover up, and seek shade when UV is high. Consult a professional about any skin concerns.
Screenshots
Verdict
The clearest difference is update cadence: Sol Glow at every 2 days against Project Function's every 6 weeks. Project Function's advantage is device support (4 vs 1). On price, ads, in-app purchases and iOS requirement 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Project Function ships an update every 6 weeks, Sol Glow every 2 days. The most recent releases landed on October 9, 2026 and September 23, 2026 respectively.
| Parameter | Project Function | Sol Glow |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Subscription |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.5 — better | 16.4 |
| Further details — not scored | ||
| Size | 181 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Project Function LLC | STONEG LLC |
In-app purchases
Project Function
No in-app purchases
Sol Glow
No in-app purchases
Questions
Is Project Function free?
Is Sol Glow free?
Do Project Function or Sol Glow have ads?
Which is updated more often, Project Function or Sol Glow?
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