Sleep Optimizer vs Caffix
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Sleep Optimizer
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Sleep problems are very common. One way to improve sleep that has proven effective is to limit the time in bed. In this app you log your approximate time spent in bed and approximately how much of this time you have actually slept. Based on your individual sleep habits the app will then give you tailored recommendations for how you in an effective and careful way can limit the number of hours you spend in bed. This to maximize your chances to get good sleep. Please note that this app is made for you who are suffering from Insomnia. If you are suffering from sleep apnea, restless leg, narcolepsy or another similar sleep disorder you shall not use this sleep app to improve your sleep. In these cases, instead please consult your doctor to get help.
Caffix
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Most people drink caffeine every day, but almost nobody manages it. CafFix changes that.ย Tell us your goal, better sleep, sharper energy, or just staying within your daily limit, and we'll build a caffeine plan around your body, your schedule, and your life. Your personalized caffeine limit: Forget the generic "400mg a day" advice. CafFix calculates your exact daily limit based on your body weight and age, so your goal actually means something. Know when to stop automatically: Based on your bedtime, CafFix tells you your caffeine cutoff time every single day. So you stop guessing why you can't fall asleep. Three goals. One app. * Sleep Better - optimize your caffeine cutoff for deeper rest * Optimize Energy - time your intake for peak performance * Just Track It - stay under your daily safety limit Always with you: Live Activities on your lock screen and a home screen widget mean you never have to open the app to know where you stand. Built around your week: Different bedtime on weekends? CafFix adapts your caffeine windows day by day. Finally, a caffeine tracker that works as hard as your morning coffee.
Screenshots
Verdict
The clearest difference is update cadence: Caffix at every 3 weeks against Sleep Optimizer's every 2 months. Sleep Optimizer's advantage is iOS requirement (13.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sleep Optimizer ships an update every 2 months, Caffix every 3 weeks. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.
| Parameter | Sleep Optimizer | Caffix |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 13.0 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 21 MB | 314 MB |
| Age rating | 4+ | 17+ |
| Developer | Livanda - Internetkliniken AB | Tunde Timea Bartha |
In-app purchases
Sleep Optimizer
No in-app purchases
Caffix
No in-app purchases









