Comparison

sleep² sleeptracker & analysis vs TK

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

Head to head
About

sleep² sleeptracker & analysis

This app acts as a personal guide to better sleep, combining innovative sleep training with precise sleep tracking and analysis. It offers an EU-approved medical device program for acute sleep disorders like insomnia, providing personalized recommendations and sleep training based on your data.

Highlights
  • Sleep tracking and analysis
  • Sleep training programs
  • Personalized recommendations
  • Interactive chatbot
  • Data import (Polar sensor, Apple Health)
  • Manual sleep diary entry
Read full description

Discover Sleep Anew: sleep² - Your Sleep Tracker sleep² is your personal guide to better sleep. It combines innovative sleep training with a precise sleep tracker. Sleep trackers provide valuable insights into your sleep. The sleep² Intensive Program is an EU-approved medical device, specifically designed for people with acute sleep disorders like insomnia. Our scientifically based method has already helped thousands improve their sleep quality through systematic and gradual sleep tracking and training. sleep² Pro: Based on sleep analysis, the program adapts to individual sleep data, delivering precise recommendations from your sleep tracker. Sleep Tracker: Analyze sleep using a Polar sensor or import data via Apple Health. Manually enter sleep data into the sleep diary if no tracker is used. Based on the sleep data, you get: Detailed recommendations based on sleep analysis Sleep training for better sleep An interactive chat-bot to help you sleep better Sleep analyses always available—no waiting like in sleep labs Precise sleep analysis through innovative algorithms for sleep improvement Free download & basic functions Full features of sleep² (precise sleep analysis, personalized programs) with subscription purchase Download sleep² - Our sleep tracker and precise sleep analysis help improve sleep! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

TK

Achieve all-round wellbeing with personalized plans for fitness, nutrition, and relaxation. Set goals, track progress with self-tests, and receive motivating tips and recipe suggestions. Integrates with smartwatches for a holistic health overview.

Highlights
  • Personalized coaching plans
  • Fitness exercises and audio coaching
  • Extensive recipe database
  • Meditation and mindfulness exercises
  • Smartwatch and fitness tracker integration
  • Progress tracking and self-tests
Read full description

Become fitter, move more, eat better or plan more time for relaxation – it’s not always easy to do it all, but the TK-Coach can help you find the right balance and achieve all-round wellbeing. In doing so, the TK-Coach focuses on your personal situation and your needs, as well as giving you motivating tips for staying on course and suitable nutrition suggestions. The TK-Coach will get you into top shape in the areas of fitness, diet and relaxation. It will help you to set specific goals and celebrate your successes – with simple recipes, sports exercises, guided meditations and lots more. Create your own plan to help increase your wellbeing week by week. Thanks to a smart suggestion logic, the app creates exactly the right coaching for you. Get started! Contents and features of the TK-Coach app • Self-tests to track your progress • A health profile that gives you an overview of your personal successes • Compatible with various smart watches and fitness trackers • Collect bonus points in the app for TK’s Bonus Plan. • Weekly and monthly reviews show your successes and give extra motivation • The app can be used in English too – provided the language setting of the device is set to English. • Download function to access content anytime Contents in the area of movement • Hip Hop Masterclass 1 • Audio coaching for running with targeted exercises and informational articles • Warm up and Cool down exercises • Circle training • Moving during your breaks • Pelvic training • Pilates • Back training • Yoga for beginners and advanced practitioners • 8-minutes workout • Connecting smartwatches and fitness trackers • Tasks to increase movement in everyday life Contents in the area of nutrition • Over 825 recipes • Specific goals for changing your diet • Questionnaire on your dietary habits • Nutrition Protocol: Receive personalised recommendations for your nutritional quality and specific calorie need • Health goal “Weight loss” for sustainable weight reduction Contents in the area of stress management • Interactive sleep podcast • Meditation and mindfulness exercises • Progressive muscle relaxation • Short breathing exercises • Short relaxation exercises • Antistress yoga • Mental health score: Using smart watches and fitness trackers, your individual mental strain can be measured. Security As a statutory health insurer, we are obliged to protect your health-related data as best as possible. The recorded data will not be passed on to TK, and entries are saved in an anonymised way. Further development We are continuously developing the app to include new functions. Your ideas and tips are the biggest help in this regard. Feel free to write to us directly via the following email address: technischer-support@tk.de. Prerequisites for access This free offer is available in unlimited form to all those insured with TK, who can obtain access to the free app via the password-protected area of the website, “My TK”. Those not insured with TK, but whose company is taking part in a TK promotional project can use the app free of charge for an unlimited period by way of a coupon code. Even if you are not insured with TK and do not have a coupon code, you can still avail yourself of the offer free of charge for four weeks by way of guest access. After four weeks, the app can only be used via the two ways mentioned above. Supported operating systems - iOS 16-18 Responsible party and operator Techniker Krankenkasse (TK)

Screenshots

sleep² sleeptracker & analysis4 screens
TK4 screens

Verdict

The call

The clearest difference is rating: TK at 4.2 against sleep² sleeptracker & analysis's 3.4. TK also leads on in-app purchases (none vs 4). sleep² sleeptracker & analysis's advantage is update cadence (every 2 weeks vs every 2 months) and ratings volume (34 vs 6). On price, review sentiment, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. sleep² sleeptracker & analysis sells 4 in-app purchases, starting at $9.99 per month. TK asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

TK holds the better App Store score, 4.2 against 3.4. That said, the two scores are not equally well evidenced: sleep² sleeptracker & analysis has 34 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 57% of sleep² sleeptracker & analysis's written reviews are positive against 52% of TK's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

sleep² sleeptracker & analysis ships an update every 2 weeks, TK every 2 months. The most recent releases landed on September 20, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
sleep² sleeptracker & analysis versus TK: the parameters behind the verdict, then further details
Parametersleep² sleeptracker & analysisTK
PriceFreeFree
Rating3.4 (34 ratings)4.2 (6 ratings) — better
Positive reviews56.6% of reviews — better51.9% of reviews
Number of ratings34 — better6
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size107 MB68 MB
Age rating4+17+
DeveloperNukkuaaTechniker Krankenkasse (TK)

Customer experience

sleep² sleeptracker & analysis

All ratings34 ratings
Positive52.9%
Neutral8.8%
Negative38.2%
Written reviews53 reviews
Positive56.6%
Neutral7.5%
Negative35.8%

TK

All ratings6 ratings
Positive66.7%
Neutral16.7%
Negative16.7%
Written reviews27 reviews
Positive51.9%
Neutral40.7%
Negative7.4%

In-app purchases

4 purchases

sleep² sleeptracker & analysis

Subscriptions2
  • sleep² PRO$9.991 Month
  • sleep² PRO$79.991 Year
One-time2
  • sleep² intensive program$39.99
  • sleep² intensive program$99.99
None

TK

No in-app purchases

Questions

Is sleep² sleeptracker & analysis free?
sleep² sleeptracker & analysis is free to download, with in-app purchases available.
Is TK free?
TK is free to download, with no in-app purchases.
Which has better reviews, sleep² sleeptracker & analysis or TK?
TK is rated higher. sleep² sleeptracker & analysis averages 3.4 out of 5 from 34 ratings, while TK averages 4.2 from 6 ratings.
Do sleep² sleeptracker & analysis or TK have ads?
Neither sleep² sleeptracker & analysis nor TK shows ads.
Which is updated more often, sleep² sleeptracker & analysis or TK?
sleep² sleeptracker & analysis ships an update every 2 weeks, and TK every 2 months. Most recently, sleep² sleeptracker & analysis was updated on September 20, 2026 and TK on September 22, 2026.

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