Comparison

Sleep Optimizer vs Caffix

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

Head to head
About

Sleep Optimizer

Features
Read full description

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.

About

Caffix

Features
Read full description

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

Sleep Optimizer4 screens
Caffix4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences ยท 4 level
Sleep Optimizer versus Caffix: the parameters behind the verdict, then further details
ParameterSleep OptimizerCaffix
PriceFreeFree
Update frequencyEvery 2 monthsEvery 3 weeks โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.0 โ€” better26.0
Further details โ€” not scored
Size21 MB314 MB
Age rating4+17+
DeveloperLivanda - Internetkliniken ABTunde Timea Bartha

In-app purchases

None

Sleep Optimizer

No in-app purchases

None

Caffix

No in-app purchases

Questions

Is Sleep Optimizer free?
Sleep Optimizer is free to download, with no in-app purchases.
Is Caffix free?
Caffix is free to download, with no in-app purchases.
Do Sleep Optimizer or Caffix have ads?
Neither Sleep Optimizer nor Caffix shows ads.
Which is updated more often, Sleep Optimizer or Caffix?
Sleep Optimizer ships an update every 2 months, and Caffix every 3 weeks. Most recently, Sleep Optimizer was updated on October 6, 2026 and Caffix on October 8, 2026.

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