PISON vs FlexLft
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PISON
This app provides insights into your cognitive and physical performance using data from compatible smartwatches. It helps you understand readiness, mental agility, and focus, with advanced metrics for sleep, stress, and health available through membership tiers.
- Cognitive performance metrics (Readiness, Agility, Focus)
- Sleep and fatigue tracking
- Stress and health monitoring
- Fitness metrics (respiratory rate, calories)
- Community leaderboards and groups
- Insights from neural sensor technology
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Unlock Your Mind. Unleash Your Potential. Pison helps you reach new heights of human performance and health. The Pison app enables you to improve your whole self. It works in tandem with smartwatches or fitness trackers that are powered by Pison sensors to give you unprecedented insights into your mind, body, fatigue, health, and safety. Note - a Pison-powered wearable and a Pison membership are required. Innovative Sensor Technology Your unique performance and health insights are possible because of Pison’s innovative sensor technology. Unlike other wearables, all Pison-powered wearables include Pison’s novel neural sensor which decodes signals from your mind and nervous system, discreetly collected at the wrist, and gives key insights about your mental state that were never before possible. Some Pison-powered wearables also include other sensors that monitor vital signals such as your heart rate, heart rate variability, breathing frequency, pulse rate, and stress. When this information is blended with the insights from Pison’s neural sensor, you get richer information about your sleep, fatigue, fitness and health. Measure. Understand. Excel. The Pison app enables anyone with a Pison membership, including Pison READY and Pison PERFORM memberships, to monitor three critical cognitive performance metrics: - Readiness - A real-time indication of your ability to mentally perform. It can reveal impairment from fatigue, head injury, diet and disease. - Mental Agility - How quickly you process information, make decisions, and react. In competitive sports or high-stress professional scenarios, Mental Agility is crucial to success. - Focus - A reliable indicator of your ability to maintain attention. This is the gold standard measurement for fatigue testing. If you have a Pison PERFORM membership, you can also monitor additional metrics, including: - Sleep/Fatigue - Sleep time, sleep stages (REM, light, deep, and awake), sleep quality, sleep debt, circadian rhythm - Stress - Emotional reactions - Health - Heart rate, resting heart rate (RHR), heart rate variability (HRV), skin temperature - Fitness - Respiratory rate, calories burned - Safety - Sustained attention (PVT-B) In addition, all Pison memberships allow you to engage with the Pison community through leaderboards and personal groups where you can share and benchmark your performance scores with elite performers, friends, family, and peers. Revolutionary insights drive success Pison helps you measure and track your cognitive performance and physical performance metrics so you can improve your performance. Pison can help you improve cognitive and physical performance: - Optimize training programs. - Adjust diet, sleep schedules or other lifestyle factors. - Understand your circadian rhythm to optimize your preparation schedule. - Detect decreases in performance that may indicate impairment from head injury, fatigue or lifestyle choices, such as drugs or alcohol use. Get focused. Play smarter. Think clearer. Whatever your challenge, wherever your opportunity, Pison delivers unprecedented awareness of your mental and physical state. Realize your full potential—on the field, in the boardroom and beyond.
FlexLft
Create and track custom weight training programs with this app. It offers smart progression suggestions, a built-in rest timer, and syncs with Apple Health. Your data stays private and on your device.
- Custom program builder
- Smart weight progression
- Built-in rest timer
- Apple Health integration
- Workout history tracking
- Offline functionality
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Transform your strength training with FlexLift - the simple yet powerful app for creating and tracking custom weight training programs. Perfect for Intermediate Lifters Whether you're following 5/3/1, StrongLifts, or your own custom program, FlexLift gives you the flexibility to build exactly what you need. No more being locked into rigid, one-size-fits-all workout plans. Core Features • Custom Program Builder - Create unlimited workout programs with your preferred exercises, sets, reps, and weights • Smart Progression - Automatic weight suggestions based on your performance to keep you progressing • Built-in Rest Timer - Stay focused with customizable rest periods between sets • Apple Health Integration - All your workouts automatically sync to Apple Health • Workout History - Track your progress and see how you've improved over time • Offline First - No internet required - your data stays on your device How It Works 1. Create your custom program with exercises, sets, reps, and starting weights 2. Start your workout and log each set as you complete it 3. Progress with smart weight suggestions for your next workout 4. Track your improvement over time with detailed workout history What Makes FlexLift Different • Truly Customizable - Build any program structure you want (A/B splits, full body, push/pull/legs, etc.) • Simple Interface - Clean, distraction-free design focused on getting your workout done • Smart Progression - Intelligent weight suggestions help you progress safely and effectively • Apple Health Ready - Seamless integration with your existing health ecosystem Perfect For • Intermediate lifters (6+ months experience) who want more flexibility • Anyone tired of being locked into rigid program structures • Lifters who want to track progression across custom programs • Users who prefer simple, focused workout apps Privacy First Your workout data stays on your device. We don't collect personal information or track your usage. Only sync to Apple Health with your explicit permission. Requirements • iOS 15.0 or later • iPhone (portrait mode optimized) • Apple Health integration (optional) Ready to take control of your strength training? Download FlexLift and build the program that works for you.
Screenshots
Verdict
The clearest difference is update cadence: PISON at every 3 weeks against FlexLft's every 2 months. PISON also leads on ratings volume (7 vs 2) and iOS requirement (15.0 vs 17.6). On price, rating, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for PISON against 5.0 for FlexLft. Both are backed by a comparable volume of ratings — 7 and 2 respectively.
PISON ships an update every 3 weeks, FlexLft every 2 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.
| Parameter | PISON | FlexLft |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) | 5.0 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 65 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Pison Technology | Joshua Colvin |
Customer experience
PISON
FlexLft
In-app purchases
PISON
No in-app purchases
FlexLft
No in-app purchases









