Comparison

Polyphasic Sleep Tracker vs NIX

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

Head to head
About

Polyphasic Sleep Tracker

This app helps you master polyphasic sleep schedules to optimize your waking hours. It offers customizable plans, smart reminders, and HealthKit integration to track and adjust your sleep patterns.

Highlights
  • Customizable sleep plans
  • Smart sleep reminders
  • HealthKit integration
  • Dark mode
  • Multiple sleep schedule options
Features
Read full description

Are you looking to transform your life through a healthier, more optimized sleep schedule? Welcome to Polyphasic, your ultimate guide to polyphasic sleep schedules. This innovative and thoughtfully designed app will serve as your personal sleep coach, assisting you in mastering polyphasic sleep patterns that fit your lifestyle and help you maximize your waking hours. Polyphasic sleep involves breaking up sleep into multiple periods throughout the day. It's an alternative to monophasic sleep, where sleep occurs in one block typically at night. By adopting a polyphasic sleep schedule, some people find they can reduce total sleep time without feeling overly tired. We understand that everyone's sleep needs are unique. That's why our app is flexible and customizable, providing tools and resources to help you adopt the polyphasic sleep schedule that's right for you. Whether you're interested in trying the Everyman, Uberman, or Dymaxion schedules or just looking for a simple siesta, Polyphasic has you covered. Our mission is to make polyphasic sleep accessible and manageable for everyone, regardless of your schedule or lifestyle. Key Features: **HealthKit Integration** Polyphasic integrates seamlessly with Apple's HealthKit, allowing your intended sleep schedule to be overlaid with actual sleep data from devices like the Apple Watch. This feature bridges the gap between your sleep goals and real-world sleep patterns, enabling accurate adjustments to your polyphasic sleep plan. **Customizable Sleep Plans** Choose from pre-set polyphasic sleep schedules or customize your own based on your personal preferences and daily routine. **Smart Reminders** Our smart algorithms give you a heads-up before each sleep session and accounts for the time you need to fall asleep. **Dark Mode** We care about your eyes as much as your sleep. That's why our app comes with a dark mode to reduce eye strain during your nightly use. Polyphasic is more than just an app; it's a lifestyle. It's for the busy entrepreneur who wants to maximize productivity, the artist seeking creative hours, or the student needing more time for studies. Anyone looking to reclaim their time and live more efficiently will find value in Polyphasic. With Polyphasic, your sleep schedule meets real-world application through our seamless integration with Apple's HealthKit. This functionality allows our app to overlay your planned polyphasic sleep schedule with actual sleep data collected from devices like the Apple Watch. This way, you can compare your intended sleep periods with when you're truly sleeping, enabling you to make meaningful adjustments and ensure your polyphasic sleep plan is genuinely working for you. Through this integration, Polyphasic is not just a planning tool, but a real-time, adaptive assistant for your sleep optimization journey. Enjoy the coherence between your sleep goals and your real-world sleep patterns with Polyphasic and HealthKit! Join us on this journey towards better sleep and a more productive life. Download Polyphasic today and wake up to a new world of possibilities! Note: Please consult with a healthcare professional before significantly altering your sleep schedule. Polyphasic sleep schedules may not be suitable for everyone, particularly for those with certain health conditions or those under 18.

About

NIX

This app transforms screen time into a competitive game with friends, rewarding users for putting their phones down. Utilize Focus mode to block distracting apps and earn bonuses, or engage in group challenges for shared goals and rewards.

Highlights
  • Screen time competition with friends
  • Focus mode to block apps
  • Group challenges and lobbies
  • Daily and head-to-head scoreboards
  • Medals and streak tracking
  • Privacy-focused data handling
Read full description

Your screen time just became a competition. NIX Scoreboard turns putting your phone down into a game you play with friends. Every minute of screen time is priced in tokens (NX). Lowest score wins. And when the day is going badly, Focus mode blocks every app on your phone and takes the score back down. Your friends see your score. Never your apps. A private goal is easy to drop; a number your best friend checks is not. You put the phone down for the same reason you show up to the gym when someone is waiting. FOCUS MODE Book 5 to 120 minutes. NIX blocks every app on your phone except the ones you choose to keep open, like Messages or Maps. Every focused minute takes 1 NX off today's score. Finish the session and a bonus comes off too. End early and you keep the minutes, not the bonus. Focus can take your day down to zero, never below. Your friends can see that you are focusing, and how long is left. PHONES DOWN Focus together at the table. One phone opens a lobby, everyone joins with a code, and you all share one end time. Pick up early and you earn nothing from that session. If everyone finishes, everyone gets a group bonus. HOW IT WORKS 1. Connect Screen Time. Your iPhone counts the minutes on your device. 2. Sort your apps into categories. Social and games cost more than productivity. 3. Add your friends and race for the lowest score. 4. Bad day? Start a focus session, or a Phones down with the people around you, and watch the score drop. WHAT'S ON THE BOARD - A daily scoreboard with your friends. Lowest score takes the day. - Head to head: tap a friend for the score between you and a line chart of your week, month or year. - Groups for roommates, a team, or a bet, each with its own board and reward. When a friend adds you to one, you get an invite and join only if you accept. - Medals for the top three, day wins, and streaks for staying on top. - Event races: one-shot competitions for a weekend, a trip, or a bet. - Five themes, from the classic dark board to Paper and an almost all-gray Graphite. Your widgets and app icon follow. PRIVACY, PLAINLY Your phone sends minutes per category. Not which apps, not what you did in them, not anything on your screen. Screen Time is read on your device and the raw numbers stay there. Focus mode blocks apps on your phone; it never reports what you opened. Connecting Screen Time also turns on Apple's adult website filter on your phone. It runs on your device, and we never see what you browse. It starts counting the day you install it. Free on iPhone. Put the phone down. Take the board.

Screenshots

Polyphasic Sleep Tracker4 screens
NIX4 screens

Verdict

The call

The clearest difference is price: NIX at Free against Polyphasic Sleep Tracker's $2.49. NIX also leads on rating (5.0 vs 3.6) and update cadence (every 6 days vs every 7 months). On ratings volume, ads, 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

CostPrice · In-app purchases · Ads · Monetization

NIX is free to download; Polyphasic Sleep Tracker costs $2.49 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NIX holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

UpkeepUpdate frequency

Polyphasic Sleep Tracker ships an update every 7 months, NIX every 6 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Polyphasic Sleep Tracker versus NIX: the parameters behind the verdict, then further details
ParameterPolyphasic Sleep TrackerNIX
Price$2.49Free — better
Rating3.6 (5 ratings)5.0 (3 ratings) — better
Positive reviews62.5% of reviews—
Number of ratings5 — better3
Update frequencyEvery 7 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size2 MB60 MB
Age rating4+12+
DeveloperFiveSheep OUNIX Development LLC

Customer experience

Polyphasic Sleep Tracker

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

NIX

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Polyphasic Sleep Tracker

No in-app purchases

None

NIX

No in-app purchases

Questions

Is Polyphasic Sleep Tracker free?
Polyphasic Sleep Tracker costs $2.49, with no in-app purchases.
Is NIX free?
NIX is free to download, with no in-app purchases.
Which has better reviews, Polyphasic Sleep Tracker or NIX?
NIX is rated higher. Polyphasic Sleep Tracker averages 3.6 out of 5 from 5 ratings, while NIX averages 5.0 from 3 ratings.
Do Polyphasic Sleep Tracker or NIX have ads?
Neither Polyphasic Sleep Tracker nor NIX shows ads.
Which is updated more often, Polyphasic Sleep Tracker or NIX?
Polyphasic Sleep Tracker ships an update every 7 months, and NIX every 6 days. Most recently, Polyphasic Sleep Tracker was updated on November 3, 2026 and NIX on October 31, 2026.

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