Comparison

Flex Log vs aXis

Price, ratings, monetisation and update history for both apps, side by side — 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

aXis

Features
Read full description

aXis is an AI body fat scanner for people who lift. Take a photo and get your body fat percentage and ten body measurements, with no calipers and no DEXA appointment. Then track every number and log your training in one place. AI BODY FAT SCAN • Body fat % from a single photo, using your height as the scale reference • Neck, chest, waist and hips, plus left and right biceps, forearms and thighs • A confidence score on every scan, and every value editable before you save • Each scan keeps its photo, so your history doubles as progress photos SYMMETRY AND TRENDS • Left vs. right biceps, thighs and forearms over time • Body fat %, daily calories, workout volume and per-exercise progress: max weight, best set or estimated one-rep max WORKOUTS, QUICK LOG AND GREASE THE GROOVE • Log full workouts from a library of 433 exercises, or create your own • Star your favorites; Quick Log records a set in two taps • Grease-the-groove mode rolls every set of the day into one workout • Edit or delete past workouts and scroll back through your whole history APPLE WATCH • Log sets from your wrist, with favorite and recent exercises first AI NUTRITION AND AI COACH • Snap a meal: the AI counts each item and estimates calories and macros, or add meals by hand • Ask the AI Coach about training, nutrition and body composition; it answers from your own measurements and meals SHARE YOUR PROGRESS • A branded physique card with your body fat %, bicep symmetry, and your Instagram handle HOW YOUR DATA IS HANDLED • Body scans, food scans and AI Coach messages are sent over an encrypted connection to Google Gemini for analysis, and only after you allow it. You can revoke that at any time in Profile → AI Permissions. • Your saved photos, measurements and workouts stay in the app on your iPhone. • We never sell your data or use your photos for advertising. aXis is a fitness tool, not a medical device. Its estimates are for fitness tracking only and are not medical advice. Always consult a qualified healthcare professional for medical advice. FREE AND PRO The workout log, symmetry charts, food journal and share card are free. aXis Pro adds AI body and food scans and the AI Coach, as a monthly or annual auto-renewing subscription with a free trial. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID subscription settings. Terms of Use: https://adelyons.com/apps/axis/terms.html Privacy Policy: https://adelyons.com/apps/axis/privacy.html

Screenshots

Flex Log4 screens
aXis4 screens

Verdict

The call

The clearest difference is in-app purchases: Flex Log at none against aXis's 2. Flex Log also leads on update cadence (every 5 days vs every 10 days) and iOS requirement (12.4 vs 15.0). On price, ads and device support there is nothing between them.

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

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

Both are free to download. aXis sells 2 in-app purchases, starting at $9.99 per month. Flex Log asks for nothing beyond the download.

UpkeepUpdate frequency

Flex Log ships an update every 5 days, aXis every 10 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Ā· 3 level
Flex Log versus aXis: the parameters behind the verdict, then further details
ParameterFlex LogaXis
PriceFreeFree
Update frequencyEvery 5 days — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.4 — better15.0
Further details — not scored
Size18 MB31 MB
Age rating17+4+
DeveloperAaron LarnerAdelyons Software LLC

In-app purchases

None

Flex Log

No in-app purchases

2 purchases

aXis

Subscriptions2
  • Axis Pro Monthly$9.991 Month
  • Axis Pro Annual7 Days trial$39.991 Year

Questions

Is Flex Log free?
Flex Log is free to download, with no in-app purchases.
Is aXis free?
aXis is free to download, with in-app purchases available.
Do Flex Log or aXis have ads?
Neither Flex Log nor aXis shows ads.
Which is updated more often, Flex Log or aXis?
Flex Log ships an update every 5 days, and aXis every 10 days. Most recently, Flex Log was updated on November 4, 2026 and aXis on October 31, 2026.

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