Comparison

Flex vs Lumis

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

Head to head
About

Flex

Features
Read full description

Flex: Stretching Routines for a Healthier You Flex is your go-to app for building flexibility, improving mobility, and relieving tension through guided stretching routines. Whether you’re waking up, cooling down after a workout, or just need a moment to relax, Flex offers personalized routines tailored to your body and goals. Why Flex? Diverse Stretching Routines: Choose from a wide range of stretches like Arm Circles, Kneeling Cat Stretch, Standing Neck Flexor Stretch, and more. Track Your Progress: Stay motivated with streak tracking, longest streak stats, and daily completion goals. Personalized Recommendations: Get routine suggestions based on your preferences and fitness level. Customizable Settings: Adjust voiceovers, sound effects, and timers to make every session your own. Set Reminders: Never miss a stretch session with easy-to-set reminders. Easy to Use: Enroll in routines, start stretching, and edit preferences with a user-friendly interface. Stretches for Every Need From dynamic warm-ups to deep relaxation, Flex has stretches to suit every moment of your day. Whether you want to target specific areas like your neck, shoulders, or hips or enjoy a full-body session, Flex has you covered. Start your journey to better flexibility, improved posture, and a more relaxed mind and body. Download Flex now and feel the difference! For terms of use and privacy policy, visit: https://betterfutures.studio/flex/terms-of-use

About

Lumis

Features
Read full description

Taking a GLP-1 medication is a big step. Whether you just started Ozempic, switched to Mounjaro, picked up Foundayo, or you're a year into your journey with Wegovy, you deserve a tracker as thoughtful about your experience as you are about your health. Lumis was built for the way GLP-1 treatment actually works β€” not just weekly injections, but daily pills, combination regimens, dose changes, and the day you decide you're ready to stop. It's the tracker that doesn't lose your data, doesn't surprise you with charges, and doesn't treat your progress like an afterthought. TRACK YOUR WAY Log injections or oral doses with the medication names you actually use β€” including compounded medications and peptide stacks. Track multiple medications at once, see where your last injections were on a body map, and keep a complete history you can scroll through anytime. Your weight, your story. Log today's weigh-in or backfill the last few months. See how your weight changed relative to your dose schedule, spot trends across weeks and months, and set a goal weight that keeps you motivated without pressure. Track how you're feeling, not just what you're taking. Log multiple symptoms per day with notes, then see patterns emerge β€” like how your nausea changes across dose adjustments. BUILT FOR YOUR WHOLE JOURNEY A GLP-1 journey rarely follows a straight line. You might reach maintenance, stay there for years, return to active loss, taper again. Most trackers assume you'll either stay on the medication forever or drift away once you reach goal. Lumis assumes neither. Maintenance mode is a fully designed phase β€” not an exit. Track the habits that matter most (protein, exercise, daily weigh-ins), set your own weight alerts on your terms, and keep the structure that worked. When your journey shifts again, switch back to active tracking the same way you switched in β€” same support, either direction. THREE DAILY GOALS β€” PROTEIN, HYDRATION, STEPS GLP-1 medications can make it hard to eat enough protein β€” and protein matters for preserving muscle during weight loss. Lumis makes it simple: log grams per meal, set a daily target, and see at a glance whether you hit it. Track hydration the same way, and let Apple Health surface your daily steps so the picture stays complete. No complicated food databases, no unreliable AI photo scanners β€” just the numbers that matter most. YOUR DATA, YOUR DEVICE Lumis stores your health data on your device, with optional iCloud sync between your own devices. Most trackers send anonymized health data to analytics services to understand product trends β€” Lumis does not. There is no third-party SDK in the app, no analytics, no telemetry. Crash data comes through Apple's privacy-protective channel only, and you can turn it off. We never see your data because the architecture makes seeing it impossible. Export your data anytime β€” it's your health history, and you should always be able to take it with you. HONEST PRICING Lumis is free to download with daily tracking included β€” doses, weight, symptoms, protein, hydration, steps, day notes, phase switching, and Apple Health sync. Premium adds cross-device iCloud sync, dose reminders, advanced maintenance tooling, and richer charts and symptom patterns β€” for $19.99 per year. No ads. No trials that secretly charge you. No price that doubles overnight. If you upgrade, it's because you chose to, not because you forgot to cancel. DESIGNED FOR iOS 26 Built natively for iOS 26 with SwiftUI and liquid glass β€” made for iPhone, not ported to it. β€” Lumis is not medical advice. It does not provide dosing recommendations, interpret your symptoms, or suggest medication changes. Always consult your healthcare provider about your GLP-1 treatment. Semaglutide, tirzepatide, orforglipron, liraglutide, dulaglutide, and exenatide are active ingredients in prescription medications. Lumis is not affiliated with or endorsed by any pharmaceutical manufacturer.

Screenshots

Flex4 screens
Lumis4 screens

Verdict

The call

The clearest difference is update cadence: Lumis at fortnightly against Flex's every 3 months. Flex's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 26.0). On price, ads and in-app purchases 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. Flex sells 2 in-app purchases, starting at $13.99 per month and Lumis sells 1 in-app purchase, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flex ships an update every 3 months, Lumis fortnightly. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

Scorecard3 real differences Β· 3 level
Flex versus Lumis: the parameters behind the verdict, then further details
ParameterFlexLumis
PriceFreeFree
Update frequencyEvery 3 monthsFortnightly β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS13.4 β€” better26.0
Further details β€” not scored
Size70 MB9 MB
Age rating17+17+
DeveloperCAPNKLUTCHDavid Ellis

In-app purchases

2 purchases

Flex

Subscriptions2
  • Premium Monthly$13.991 Month
  • Premium Annual$39.991 Year
1 purchases

Lumis

Subscriptions1
  • Lumis Premium$19.991 Year

Questions

Is Flex free?
Flex is free to download, with in-app purchases available.
Is Lumis free?
Lumis is free to download, with in-app purchases available.
Do Flex or Lumis have ads?
Neither Flex nor Lumis shows ads.
Which is updated more often, Flex or Lumis?
Flex ships an update every 3 months, and Lumis fortnightly. Most recently, Flex was updated on November 8, 2026 and Lumis on November 5, 2026.

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