Comparison

PKU vs flexigym

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

Head to head
About

PKU

This app helps individuals manage their Phenylalanine (PHE) intake by tracking food consumption. It allows users to add custom foods, create recipes, and set supplement reminders. A daily overview shows remaining PHE allowance, and a blood value list provides a quick health summary.

Highlights
  • Track Phenylalanine (PHE) intake
  • Add custom foods and recipes
  • Daily PHE allowance overview
  • Supplement reminder alerts
  • Blood value list
  • Recipe management with average PHE per 100g
Features
Read full description

Using PKU App will keep you on track. If you are forced to keep track of all food you ingest because you need to count the amount of Phenylanalin, then this app is just for you. ************************************************************************ At a glance: In the daily overview you can see how much PHE (phenylalanine) you still need in order to complete your daily amount. ************************************************************************ You can add your own food to the food list and favor all those ones which you need for fast access. ************************************************************************ With the recipe management you can create own recipes based on your food list. For each recipe a mean value is calculated for PHE per 100g. ************************************************************************ A simple blood value list for a quick overview ************************************************************************ In order to get alerted for taking your supplements regularly you can create custom recurring alerts. ************************************************************************ I am open to any feature requests and suggestions. Please drop your feedback here: http://jira.barz.eu/servicedesk/customer/portal/3 If you like my app please add a postive review on the AppStore. Thank you

About

flexigym

Features
Read full description

Elevate your fitness routine with the app! It's your all-in-one solution to easily monitor your workouts, track progress, and achieve your fitness goals with engaging insights and motivation. The app offers an array of features, including: Workout Tracking Seamlessly capture all your workout data from gym equipment or manually enter it for a complete record. Training Plans Optimize your workouts with personalized plans provided by your fitness facility or trainer. Activity Levels Stay motivated with encouraging milestones as you progress to higher levels. Fun Challenges Challenge yourself with time-based activities that reward you with kudos, activity points, and prizes. Schedules Manage and book classes with ease to keep yourself on track. And much more! The app integrates with HealthKit to help you save your workouts and contribute to your fitness goals and challenges. Have a comment or question about the app? Email our team directly at digitalsupport@egym.com.

Screenshots

PKU4 screens
flexigym4 screens

Verdict

The call

The clearest difference is in-app purchases: flexigym at none against PKU's 1. PKU's advantage is update cadence (every 2 months vs every 10 months) and iOS requirement (8.0 vs 15.0). On price, 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. PKU sells 1 one-off in-app purchase. flexigym asks for nothing beyond the download.

UpkeepUpdate frequency

PKU ships an update every 2 months, flexigym every 10 months. The most recent releases landed on August 9, 2026 and September 7, 2026 respectively.

Scorecard3 real differences · 7 level
PKU versus flexigym: the parameters behind the verdict, then further details
ParameterPKUflexigym
PriceFreeFree
Rating4.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 months — betterEvery 10 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod, Apple Watch — better
Requires iOS8.0 — better15.0
Further details — not scored
Size22 MB173 MB
Age rating12+12+
DeveloperMaik BarzFlexigym Anstalt

In-app purchases

1 purchases

PKU

One-time1
  • Unlock premium features$2.99
None

flexigym

No in-app purchases

Questions

Is PKU free?
PKU is free to download, with in-app purchases available.
Is flexigym free?
flexigym is free to download, with no in-app purchases.
Do PKU or flexigym have ads?
Neither PKU nor flexigym shows ads.
Which is updated more often, PKU or flexigym?
PKU ships an update every 2 months, and flexigym every 10 months. Most recently, PKU was updated on August 9, 2026 and flexigym on September 7, 2026.

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