Comparison

Habit Tracker vs Protocol66

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

Head to head
About

Habit Tracker

Features
Read full description

Habit Tracker helps you build routines that are maintained over time. Define clear habits, mark your daily checklist and see how your streaks grow. No distractions: just you and your goals. What can you do? Create habits with daily or weekly goals. Mark your checklist in seconds and see your streaks instantly. Activate reminders so as not to forget what is important. Review your progress with progress and trend (week and month). Organize habits by categories and priority. Dark mode and a fast, minimalist and noise-free interface. How does it work? Choose 1-3 key habits (e.g.: read 10 min, hydrate, train). Mark them every day and protect your streak. Watch your progress and adjust with small improvements. Repeat for 66 days and turn actions into "automatic". Designed for you Clean design: easy to use, even on busy days. Focus on perseverance and not on perfection. Simple statistics to maintain motivation. Mismly requires a paid subscription to unlock the full protocol and AI Coach. Choose Monthly (with a 3-day free trial), Annual, or a one-time Lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mismly.com/privacy/

About

Protocol66

Features
Read full description

66 days. 5 habits. Miss a day, start over. Protocol 66 is the science-backed alternative to extreme fitness challenges. Based on habit formation research โ€” not bro science โ€” it takes exactly 66 days to build lasting habits. THE RULES ARE SIMPLE - Pick 5 daily habits - Complete all 5 every day - Miss a day, restart from zero - Rest days are earned, not given WHY 66 DAYS? Research by Phillippa Lally at University College London found it takes an average of 66 days to form automatic habits. Not 21. Not 30. Not 75. THIS ISN'T FOR EVERYONE No streaks to protect you. No lives. No second chances. If you're looking for an app that goes easy on you, this isn't it. Ready to commit? -------------------------------------------------------------------------------- Privacy Policy: https://www.pocketapps.studio/protocol66/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Habit Tracker4 screens
Protocol664 screens

Verdict

The call

The clearest difference is update cadence: Protocol66 at every 2 weeks against Habit Tracker's every 5 weeks. 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. Habit Tracker sells 3 in-app purchases, starting at $3.99 per month and Protocol66 sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Habit Tracker ships an update every 5 weeks, Protocol66 every 2 weeks. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

Scorecard1 real difference ยท 5 level
Habit Tracker versus Protocol66: the parameters behind the verdict, then further details
ParameterHabit TrackerProtocol66
PriceFreeFree
Update frequencyEvery 5 weeksEvery 2 weeks โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.6 โ€” better18.0
Further details โ€” not scored
Size5 MB35 MB
Age rating4+12+
DeveloperMismly LLCPOCKET APPS STUDIO PTE. LTD.

In-app purchases

3 purchases

Habit Tracker

Subscriptions2
  • Tracker Premium3 Days trial$3.991 Month
  • Premium Annual$29.991 Year
One-time1
  • Premium Lifetime$59.99
3 purchases

Protocol66

Subscriptions2
  • Pro Version3 Days trial$2.997 Days
  • Pro7 Days trial$19.991 Year
One-time1
  • Lifetime Access$3.99

Questions

Is Habit Tracker free?
Habit Tracker is free to download, with in-app purchases available.
Is Protocol66 free?
Protocol66 is free to download, with in-app purchases available.
Do Habit Tracker or Protocol66 have ads?
Neither Habit Tracker nor Protocol66 shows ads.
Which is updated more often, Habit Tracker or Protocol66?
Habit Tracker ships an update every 5 weeks, and Protocol66 every 2 weeks. Most recently, Habit Tracker was updated on October 17, 2026 and Protocol66 on October 6, 2026.

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