Comparison

Flex vs GallDiet

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

Head to head
About

Flex

Effortlessly track your strength training progress, build personalized workout routines, and visualize your lifts with an intelligent plate calculator. Syncs data across devices using iCloud for seamless access and prioritizes privacy with Sign in with Apple.

Highlights
  • Effortless workout tracking
  • Personalized workout templates
  • Customizable workout folders
  • Smart Plate Calculator
  • Cross-device iCloud sync
  • Privacy-focused with Sign in with Apple
Features
Read full description

Flex is the ultimate companion for your strength training journey. Whether you're a powerlifter, bodybuilder, or just getting started in the gym, Flex helps you track your progress, build strength, and achieve your fitness goals with simplicity and precision. Experience effortless workout tracking designed to keep you focused on your lift, not your phone. You can build personalized workout templates for any routine and organize them into custom folders to keep your training schedule clean and accessible. With the built-in Smart Plate Calculator, you never have to do gym math again.... Flex automatically visualizes how to load the bar for your specific lifts. Your workouts go where you go. Flex seamlessly syncs your data across all your devices using iCloud, so your history is always up to date. Designed with privacy in mind, Flex uses Sign in with Apple and iCloud to ensure your health data remains secure without third-party accounts. Build consistency and see results. Download Flex today and make every rep count. Flex is designed and built by two fitness freaks, Ashton Krstolic and Kevin Brown. Every feature exists because we needed it at the rack. Questions or ideas? Visit our support page — we read every message.

About

GallDiet

Identify and avoid personal food triggers for gallbladder attacks. Scan meals to get a safety score, discover risky ingredients, and find safer recipe alternatives. Track symptoms to understand your unique patterns.

Highlights
  • Personalized meal safety scores
  • Identify risky ingredients with explanations
  • Track attacks and symptoms
  • Discover personal trigger patterns
  • Suggest safer recipe alternatives
  • Scan packaged food barcodes
Features
Read full description

If you've had a gallstone attack, you already know: it's never just "fatty food." It's the lasagna at 10pm. The shrimp alfredo. The cream-based sauce you thought was safe. The salmon everyone calls healthy. And if your gallbladder is already out, you know the other surprise: the attacks were supposed to stop. For a lot of people after a cholecystectomy, certain foods still cause trouble, and nobody hands you a list on the way out of hospital. Your triggers are specific to you. GallDiet helps you find them and avoid the kind of pain that sends people to the ER at 3am. Built after a gallstone attack that led to the ER, and the frustration of not knowing what foods were actually safe. HOW IT WORKS Scan a meal before you eat it. GallDiet identifies what's in your meal and flags the ingredients most likely to trigger an attack, based on known triggers and what your body has reacted to before. It gives you a clear 0-100 safety score and you see what's risky and why, before it's too late. Fat matters, but it isn't the whole story. Preparation, portion, spice and timing all show up in real trigger patterns, and yours won't look like anyone else's. If you've had your gallbladder removed, GallDiet scores food more strictly for you. Without a gallbladder there's no reservoir to release bile when a fatty meal arrives, and your results reflect that. Scan packaged-food barcodes for an instant, personalized safety score, no typing required. Transform unsafe meals into safer alternatives with specific substitutions tailored around your triggers, so you don't have to give up foods you enjoy entirely. Track attacks and symptoms as they happen. Over time, GallDiet connects the dots between what you ate and how you felt, so you can spot the patterns that are specific to your body. Not generic "low-fat diet" advice. Your actual triggers. WHAT YOU GET - Personalized safety scores on any meal you scan - Risky ingredients flagged instantly, with explanations - Stricter scoring if your gallbladder has been removed - See exactly which meals led to pain, and how long it took - A clear breakdown of your personal trigger patterns over time - Safer swaps for recipes that usually cause problems - A clear record of what was safe vs what wasn't WHO IT'S FOR - Newly diagnosed and unsure what's safe - Recovering from gallbladder removal surgery - Still reacting to food months or years after a cholecystectomy - Waiting for surgery and trying to avoid attacks - Managing gallstones through diet Stop guessing. Start knowing what your body can handle. FREE AND PREMIUM Free: 3 photo scans per day, 30 barcode scans per month, 3 recipe modifications per month. Premium: Unlimited scans, unlimited history, full pattern analysis, and advanced tools. A NOTE ON MEDICAL ADVICE GallDiet is for educational and informational purposes only. It doesn't replace a doctor, a diagnosis, or a treatment plan. Always consult a qualified healthcare professional for medical guidance. If you're having a gallbladder attack, seek medical care. Subscription terms: Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage and cancel in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://galldiet.com/privacy

Screenshots

Flex4 screens
GallDiet4 screens

Verdict

The call

The clearest difference is review sentiment: Flex at 100% against GallDiet's 50%. Flex also leads on in-app purchases (none vs 4) and rating (5.0 vs 4.6). GallDiet's advantage is update cadence (every 4 days vs every 6 months) and iOS requirement (15.1 vs 18.0). On price, ratings volume, ads 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. GallDiet sells 4 in-app purchases, starting at $9.99 per 7 days. Flex asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Flex holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 9 respectively. Written reviews point the same way: 100% of Flex's written reviews are positive against 50% of GallDiet's.

UpkeepUpdate frequency

Flex ships an update every 6 months, GallDiet every 4 days. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
Flex versus GallDiet: the parameters behind the verdict, then further details
ParameterFlexGallDiet
PriceFreeFree
Rating5.0 (7 ratings) — better4.6 (9 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings79 — better
Update frequencyEvery 6 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size3 MB47 MB
Age rating4+17+
DeveloperKEVIN BROWNCaleb Oki

Customer experience

Flex

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

GallDiet

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Flex

No in-app purchases

4 purchases

GallDiet

Subscriptions4
  • Premium Weekly$9.997 Days
  • GallDiet Premium$14.991 Month
  • GallDiet Premium3 Days trial$129.991 Year
Show 1 more
  • GallDiet Premium1 Year trial$129.991 Year

Questions

Is Flex free?
Flex is free to download, with no in-app purchases.
Is GallDiet free?
GallDiet is free to download, with in-app purchases available.
Which has better reviews, Flex or GallDiet?
Flex is rated higher. Flex averages 5.0 out of 5 from 7 ratings, while GallDiet averages 4.6 from 9 ratings.
Do Flex or GallDiet have ads?
Neither Flex nor GallDiet shows ads.
Which is updated more often, Flex or GallDiet?
Flex ships an update every 6 months, and GallDiet every 4 days. Most recently, Flex was updated on September 23, 2026 and GallDiet on October 2, 2026.

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