Personal UV Exposure vs Caffff
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Personal UV Exposure
This app tracks your personalized UV exposure by combining time spent outdoors with real-time UV Index data. It provides customized insights and an interactive chart to help you make informed decisions about sun exposure.
- Personalized UV exposure tracking
- Real-time UV Index data
- Interactive UV index chart
- Time in daylight monitoring
- User-friendly interface
- Historical data access
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Personal UV Exposure: Your Personalized UV Monitoring Solution Protect your skin and make smarter outdoor choices with Personal UV Exposure, the app that tracks your personalized UV exposure. Unlike standard UV apps, Personal UV Exposure combines your actual time spent outdoors with real-time UV Index data to give you accurate and customized insights. Key Features: • Personalized UV Exposure Tracking: Monitor your UV exposure based on the time you spend outdoors, along with precise UV Index data from your current location. Get real-time updates to help you decide when it’s safe to enjoy the sun and when it’s best to stay indoors. • Interactive UV Index Chart: Visualize your exposure throughout the day with an intuitive, color-coded chart that highlights periods of high and low UV risk. The app also tracks your time in daylight to provide a complete picture of your sun exposure. • User-Friendly Interface: Navigate effortlessly with a clean and easy-to-use design that puts essential UV information right at your fingertips. Subscription Details: The app is free to use for viewing your UV exposure, time in daylight, and UV Index data for the current day. With a monthly or yearly subscription, you can access all your historical data, allowing you to spot trends and make more informed decisions about your sun exposure.  Why Choose Personal UV Exposure? Personal UV Exposure stands out by tailoring its insights to your actual time outdoors, offering a level of accuracy and personalization unmatched by generic UV apps. Whether you’re soaking up the sun or staying in the shade, Personal UV Exposure helps you manage your exposure intelligently. Note: Time in daylight monitoring requires an Apple Watch SE (2nd generation) or Apple Watch Series 6 or later. Download Personal UV Exposure today to explore its unique features and subscribe for full access to unlock your complete UV exposure insights!
Caffff
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Caffff tracks the caffeine in your body over time and helps you protect your sleep. Log a drink and watch a live curve of the caffeine in your bloodstream — see how much is in you right now, what you'll have left at bedtime, and the exact "last call" time to stop drinking and still sleep clean. • Live decay curve. A single-compartment pharmacokinetic model with a configurable half-life, drawn beautifully in dark mode. • One-tap logging. Quick-add tiles for coffee, espresso, energy drinks and more — the strip learns your habits. Backdate a drink you forgot in two taps. • Sleep protection. Set your bedtime and a sleep-safe threshold; Caffff warns you when a drink puts tonight at risk and reminds you of your daily caffeine cutoff. • Home Screen & Lock Screen widgets. Your level at a glance, with one-tap logging. • Weekly insights. Your total, daily average, top drink, and week-over-week trend. Caffff Pro adds full history, Health sleep insights, a custom half-life, and unlimited custom drinks. Caffff shows estimates, not measurements, and is not medical advice. Health: Caffff can read your sleep (Pro) and optionally write your caffeine to Health. This data stays on your device. Caffff has no servers, no analytics, and no tracking. Privacy Policy: https://akselcb-sketch.github.io/caffff-legal/privacy-policy.html Terms of Use (EULA): https://akselcb-sketch.github.io/caffff-legal/terms.html
Screenshots
Verdict
Personal UV Exposure and Caffff are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Personal UV Exposure sells 2 in-app purchases, starting at $0.99 per month and Caffff sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Personal UV Exposure | Caffff |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Benjamin Neil Gerdemann | HELGE JOHANNESSEN BJORLAND |
In-app purchases
Personal UV Exposure
- 1 Month of UV Monitoring$0.991 Month
- 1 Year of UV Monitoring$5.991 Year
Caffff
- Caffff Pro7 Days trial$2.991 Month









