Comparison

Stack vs MicroHabit Physics

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

Head to head
About

Stack

Features
Read full description

Stack is a routine execution system for people who already know what they should be doing. You have a supplement stack. A skincare routine. A training programme. The problem isn't information, it's execution. Stack turns everything you already have into a clean daily checklist, then gets out of your way. IMPORT ANYTHING Paste your routine as raw text like notes, a WhatsApp message, a list, an AI summary. Stack reads it and builds your structured routine automatically. No templates. No manual entry. Just paste and go. TODAY VIEW Every block due today appears in one flat list, in order. Morning supplements. Evening skincare. Push day. You open the app, work through the list, and close it. That's the entire interaction. PROTOCOLS LIBRARY All your routines live in one place. Skincare, Supplements, Fitness, anything else. Each protocol shows how many steps are scheduled today and your current completion rate. Tap in to drill down to individual steps. HISTORY LOG Look back at any day. See exactly what you completed, what you skipped, and any notes you added. Useful for spotting patterns over time like realising you always miss Tuesday evening. INSIGHTS Weekly and monthly adherence charts with AI-generated analysis. Stack looks at your completion data across all protocols and surfaces specific, actionable observations, not generic encouragement. BUILT FOR PROTOCOL PEOPLE Stack is not a habit-building app. There are no streaks, no badges, no motivational quotes. It assumes you already have the discipline. It just removes the friction between knowing what to do and actually doing it. Works with any routine: supplements, skincare, training splits, mobility work, morning shakes, medication, meal prep. If it has steps, Stack can hold it. Dark and light mode. Notification reminders. Cloud sync across devices. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getstackapp.xyz/privacy Stack Terms: https://getstackapp.xyz/terms

About

MicroHabit Physics

This app helps you understand the long-term impact of your daily habits. It visualizes your progress, identifies habits that help or hinder you, and allows you to explore how changes might affect your overall trajectory.

Highlights
  • Track daily habits and consistency
  • Visualize habit momentum and trajectory
  • Identify habits that help or hinder progress
  • Explore 'what-if' habit change scenarios
  • View analytics and weekly reviews
  • Create custom habits or use templates
  • Home and Lock Screen widgets
Features
Read full description

MicroHabit Physics See where your habits are taking you. Most habit trackers show you what you did. MicroHabit Physics helps you understand where your current habits are taking you. Track daily habits, build consistency, see what's moving you forward or holding you back, and explore how changing your routine could affect your momentum and trajectory. ### TRACK YOUR HABITS Build a daily routine around the habits that matter to you. • Log habits with a quick daily check-in • Create positive habits and habits you want to reduce • Set schedules and reminders • Track completion history and consistency • Choose from ready-made habits or create your own ### SEE YOUR MOMENTUM Your habits work together to create a pattern. MicroHabit Physics turns your tracked behavior into a simple momentum model that helps you see whether your current routine is moving forward, losing momentum, or staying steady. ### FIND WHAT'S MOVING YOU FORWARD The Forces view shows which habits contribute most to your positive momentum. See which behaviors are becoming the strongest parts of your routine and understand how consistency contributes to your progress. ### SEE WHAT'S HOLDING YOU BACK Some behaviors create friction. The Friction view highlights habits working against your positive routine, helping you identify patterns that may be slowing your progress. ### SEE YOUR TRAJECTORY Your daily actions add up. Trajectory gives you a longer-term view of your current habit pattern, helping you understand the direction your consistency is heading. Look beyond today's checkmarks and see where your current pattern could take you. ### EXPLORE WHAT-IF SCENARIOS What would happen if you changed one habit? Use What-If comparisons to explore how adding or removing a habit can affect your projected momentum and trajectory. • What if I stop a habit that's creating friction? • What if I add a new positive habit? • Which habit could make the biggest difference? Turn habit tracking into something you can explore and act on. ### UNDERSTAND YOUR PROGRESS Go beyond individual streaks. Explore analytics, habit history, momentum trends, completion patterns, insights, and weekly reviews to understand how your routine changes over time. ### BUILD A ROUTINE THAT FITS YOUR LIFE Create habits across the areas that matter to you: • Health & fitness • Focus & productivity • Reading & learning • Recovery & mindfulness • Personal routines • Breaking unwanted habits Start with your own habits or choose from the built-in habit template library. ### KEEP YOUR HABITS WITH YOU Use Home Screen and Lock Screen widgets to keep your habits and progress visible throughout your day. Set reminders to help you stay consistent. ### A DIFFERENT WAY TO LOOK AT HABITS A streak tells you how long you've continued. A completion rate tells you how often you've done something. MicroHabit Physics adds another question: Where is this pattern taking me? Track the actions. Understand the forces behind them. See your momentum. Explore your trajectory. Decide what to change next. ### KEY FEATURES • Daily habit tracking • Habit schedules and reminders • Momentum scoring • Forces and friction analysis • Projected habit trajectory • What-If comparisons • Progress analytics and trends • Habit history and consistency tracking • Personalized insights • Weekly reviews • Habit templates • Home Screen and Lock Screen widgets • iPhone and iPad support • Optional premium features • iCloud sync for supported premium features ### START SMALL. SEE THE DIRECTION. Your habits are already shaping your routine. Start tracking the habits that matter to you and see where your habits are taking you. Privacy Policy: https://khsalman.github.io/microhabit-physics/privacy/ Terms of Use: https://khsalman.github.io/microhabit-physics/terms/ Support: https://khsalman.github.io/microhabit-physics/support/

Screenshots

Stack4 screens
MicroHabit Physics4 screens

Verdict

The call

The clearest difference is ads: Stack at none against MicroHabit Physics's shown. Stack also leads on iOS requirement (15.1 vs 18.0). On price, update cadence, 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

Both are free to download. Stack sells 3 in-app purchases, starting at $3.99 per month and MicroHabit Physics sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Stack ships an update every 6 days, MicroHabit Physics every 10 days. The most recent releases landed on October 13, 2026 and October 21, 2026 respectively.

Scorecard2 real differences · 8 level
Stack versus MicroHabit Physics: the parameters behind the verdict, then further details
ParameterStackMicroHabit Physics
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 6 days — betterEvery 10 days
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.1 — better18.0
Further details — not scored
Size62 MB16 MB
Age rating4+4+
DeveloperNaveen SenapathiKhawaja Salman Nadeem

In-app purchases

3 purchases

Stack

Subscriptions2
  • Stack Pro Monthly$3.991 Month
  • Stack Pro Annual1 Month trial$39.991 Year
One-time1
  • Stack Pro Lifetime$79.99
3 purchases

MicroHabit Physics

Subscriptions2
  • Pro Monthly$1.991 Month
  • Pro Yearly$14.991 Year
One-time1
  • Lifetime Access$29.99

Questions

Is Stack free?
Stack is free to download, with in-app purchases available.
Is MicroHabit Physics free?
MicroHabit Physics is free to download, with in-app purchases available.
Do Stack or MicroHabit Physics have ads?
MicroHabit Physics shows ads; Stack does not.
Which is updated more often, Stack or MicroHabit Physics?
Stack ships an update every 6 days, and MicroHabit Physics every 10 days. Most recently, Stack was updated on October 13, 2026 and MicroHabit Physics on October 21, 2026.

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