Sleep Calculator vs Soluvit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleep Calculator
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Wake up refreshed and fall asleep easier with Sloth Sleep Time Calculator, your simple, science-based guide to better rest. Whether you’re trying to get on a healthier sleep schedule, wake up without grogginess, or simply understand your ideal bedtime, this app helps you plan sleep around your body’s natural rhythms. Why Sleep Cycles Matter Your sleep runs in cycles of roughly 90 minutes. Waking up in between cycles can leave you feeling tired, even if you slept for a long time. Sleep Calculator uses this cycle-based approach plus an average 14-minute fall-asleep time to help you choose the best times to go to sleep or wake up. It takes the guesswork out of setting your schedule and increases your chances of waking up clear-headed and energized. What You Can Do with Sloth Sleep Time Calculator • Calculate ideal wake up times: Enter when you plan to go to sleep, and instantly get recommended wake times based on 5–6 sleep cycles. • Calculate ideal bedtimes: Enter when you need to wake up, and the app will show the best times to fall asleep to complete full sleep cycles. • Bedtime reminders: Set optional notifications so you never forget when it’s time to wind down for the night. • Dark Mode Support: Designed with a clean, calming interface that automatically adapts to Dark Mode for comfortable night time use. • Helpful FAQs and sleep tips: Explore answers to common questions about sleep cycles, habits, and how to build a routine that improves your rest. Learn practical tips on winding down, improving sleep quality, and understanding how your body’s rhythms work. Designed for Simplicity Sleep Time Calculator is built to be quick, intuitive, and calming. No complicated menus, no unnecessary tracking, just accurate cycle-based guidance you can use anytime. Whether you're resetting a schedule after travel, planning your night around an early morning, or just experimenting with new sleep habits, the app makes it easy. Perfect For: • Students with irregular sleep schedules • Parents juggling early mornings • Shift workers trying to stay balanced • Anyone wanting to feel more rested • People curious about sleep cycles and healthy routines Sleep Better, Live Better Quality sleep affects every part of your life, focus, mood, energy, and overall health. Sleep Time Calculator gives you a simple place to start better timing. With the right sleep and wake times, you’re more likely to wake up refreshed, reduce grogginess, and enjoy more consistent energy throughout the day.
Soluvit
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Soluvit is your all-in-one UV Index tracker, sun exposure timer, and vitamin D estimate app — on iPhone, iPad, and Apple Watch — and it runs on Apple Silicon Macs and Apple Vision Pro too. If you want to monitor daily UV risk, track safe sunlight sessions, and build better sun habits, Soluvit gives you practical insights in seconds. What you can do with Soluvit: • Check the live UV Index, risk level, and air quality • Start a sun session with a live burn-limit countdown • Set a Burn Limit Alarm — a real alarm when your safe sun time runs out, even in silent mode • See a 10-day UV forecast with an hourly curve to plan your day • Track a daily vitamin D goal (IU) and log supplements with reminders • Save exposure and vitamin D data to Apple Health • Use Home Screen and Lock Screen widgets • Follow active sessions with Live Activities and the Dynamic Island • Sync your history across devices with iCloud • Enjoy a two-column iPad dashboard with today's UV curve built in Soluvit on Apple Watch: • Fully standalone — track sessions without your iPhone • Wrist taps warn you as you approach your burn limit • UV complications for your watch face and the Smart Stack • Start a session with the Action Button or Double Tap Why users choose Soluvit: • Fast, clean, native interface focused on daily use • Personalized to your skin type, clothing, sunscreen, and environment • Useful for outdoor routines, walking, beach days, and sports • Private by design — your data stays in your iCloud and Apple Health
Screenshots
Verdict
The clearest difference is ads: Soluvit at none against Sleep Calculator's shown. Sleep Calculator's advantage is iOS requirement (15.1 vs 26.0). On price, in-app purchases and device support 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.
| Parameter | Sleep Calculator | Soluvit |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 33 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | CHROMIUMONE PRIVATE LIMITED | Tansu Asici |
In-app purchases
Sleep Calculator
No in-app purchases
Soluvit
No in-app purchases









