Comparison

Flex Log vs Human OS

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

Head to head
About

Flex Log

Features
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Welcome to Flex Log, the app for anyone who's ever thought, "If only I could track my productivity hacks... with another productivity hack." It's like your standard health and productivity app, but without the rigid frameworks and one-size-fits-all approach. It's adaptable to fit the way you track. Why Flex Log? Because who doesn't love tracking their life with an app? Flex Log brings a bit of order to your chaotic world, with the added bonus of making you feel like a productivity guru. It's the app for people who love data, but also value simplicity and ease of use in their everyday life. For the Aspiring Life Optimizers: You're the kind of person who tries to squeeze productivity out of every second (while listening to podcasts you swear you'll apply to your life someday). Flex Log is here to help you track, well, whatever you think is worth tracking. No judgments here! Customize Without the Complexity: Our app is more adaptable than your yoga instructor. Want to track your caffeine intake or the number of times you actually remember to water your plants? Flex Log has got your back. Built with the power-user in mind, so you can dive deep into customization, creating a setup that's as complex and unique as your goals. Join Our Band of Happy Trackers: Download Flex Log and become part of a community that loves to optimize their lives, but also knows how to laugh at the little absurdities. Remember, life's a journey – might as well have an app that makes the ride more interesting. Flex Log: Your Life, Tracked Your Way (With a Smile). Features: - Quick data entry - Task tracking - User defined activities with custom icons - Point in time as well as time range tracking - Custom fields so you can track anything in a structured format - Data never leaves your phone - Customized views Coming soon: - Recurring tasks based on calendar or last completion date - Reminder notifications - Voice entry with siri and google assistant - Data sync to notion or google sheets - Goals and charts. Visualize what's most important.

About

Human OS

Features
Read full description

YOUR BODY HAS A BATTERY. DON'T LET IT DIE. We take better care of our phones and digital pets than we do of ourselves. Human OS changes that. It visualizes your fundamental needs - Food, Water, Rest, and Social Connection - as simple, decaying energy bars. If it’s not on the screen, it doesn’t exist. Human OS puts your physical state right on your Home Screen with beautiful widgets, giving you the "object permanence" you need to stop ignoring your body. WHY HUMAN OS? Most health apps want you to be a data scientist. They ask for calories, milliliters, and sleep cycles. Human OS just asks: β€œHow do you feel?” FEATURES: - 4 Core Vitals Track Fuel, Hydration, Battery (Rest), and Connection. Watch them slowly deplete over time, just like a classic digital pet. - Intuitive Sliders No tedious data entry. Just slide the bar to match your feeling. Tap for a quick boost, or slide for precision. - Smart Morning Reset Bad days happen. Human OS forgives you. Every morning between 6-10 AM, your vitals automatically reset (Battery to 100%, Fuel to 50%) so you never wake up to a screen full of red warnings. - Home Screen Widgets Keep your vitals visible at all times. If you have ADHD or get hyper-focused, the widget is your gentle nudge to drink water or take a break. - 100% Private & Offline Your health data is yours. Human OS runs entirely on your device. No cloud, no tracking, no ads. WHO IS THIS FOR? - ADHD Brains: Who forget to eat or drink until they crash. - Creators & Devs: Who get lost in "flow state" for hours. - Burnout Prone: Who need a visual signal to slow down. PRICING Human OS is a one-time purchase for lifetime access. No subscriptions. Ever. Stop running on empty. Install Human OS and keep your character alive.

Screenshots

Flex Log4 screens
Human OS4 screens

Verdict

The call

The clearest difference is in-app purchases: Flex Log at none against Human OS's 1. Flex Log also leads on iOS requirement (12.4 vs 16.0). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Human OS sells 1 one-off in-app purchase. Flex Log asks for nothing beyond the download.

Scorecard2 real differences Β· 4 level
Flex Log versus Human OS: the parameters behind the verdict, then further details
ParameterFlex LogHuman OS
PriceFreeFree
Update frequencyEvery 5 daysβ€”
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPod β€” betteriPhone
Requires iOS12.4 β€” better16.0
Further details β€” not scored
Size18 MB2 MB
Age rating17+4+
DeveloperAaron LarnerWIKTOR BORYS TENDERA

In-app purchases

None

Flex Log

No in-app purchases

1 purchases

Human OS

One-time1
  • Custom indicators$3.99

Questions

Is Flex Log free?
Flex Log is free to download, with no in-app purchases.
Is Human OS free?
Human OS is free to download, with in-app purchases available.
Do Flex Log or Human OS have ads?
Neither Flex Log nor Human OS shows ads.

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