Flex vs The Plus Set
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flex
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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
The Plus Set
This app simplifies tracking your Wendler 5/3/1 workouts, including Boring But Big assistance. It automatically calculates weights, tracks progress, and features a built-in rest timer. Focus on your training with smart progression and flexible customization.
- Automatic weight calculation
- Plate loading guidance
- Warmup and working set tracking
- AMRAP set prompts
- Estimated 1RM calculation
- Built-in rest timer
- Calendar workout history
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The Plus Set is a clean, focused app for tracking Wendler 5/3/1 workouts with Boring But Big (BBB) assistance work. SIMPLE WORKOUT TRACKING • Automatically calculates weights for each set based on your training maxes • Shows exact plate loading for every weight (no more mental math) • Tracks warmup sets, working sets, and BBB assistance work • Tap to log reps, with special prompts for AMRAP sets SMART PROGRESSION • Calculates estimated 1RM from your AMRAP performance using the Epley formula • Automatically suggests new training maxes after each cycle • Training maxes only go up, never down BUILT-IN REST TIMER • Automatic rest timer starts after each set • Configurable durations for warmup, working sets, and BBB • Choose from 8 different chime sounds • Access timer anytime from the dedicated Timer tab TRACK YOUR PROGRESS • Calendar view shows workout history at a glance • Personal records tracked automatically • PR celebrations when you hit new bests • Export your full workout history for backup or analysis FLEXIBLE TRAINING • Choose which exercise to start each session • Change exercises mid-workout if needed • Customize exercise order to match your schedule • Adjustable training max percentage (80-100%) SYNCS ACROSS DEVICES • iCloud sync keeps your data backed up • Access your workout history on all your devices NO SUBSCRIPTIONS • One-time purchase, no recurring fees • No ads, no tracking, no accounts required Whether you're new to 5/3/1 or a seasoned lifter, The Plus Set helps you focus on what matters: putting in the work and getting stronger.
Screenshots
Verdict
The clearest difference is in-app purchases: The Plus Set at none against Flex's 2. The Plus Set also leads on update cadence (every 2 weeks vs every 3 months). Flex's advantage is iOS requirement (13.4 vs 17.0). 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
Both are free to download. Flex sells 2 in-app purchases, starting at $13.99 per month. The Plus Set asks for nothing beyond the download.
Flex ships an update every 3 months, The Plus Set every 2 weeks. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.
| Parameter | Flex | The Plus Set |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 13.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 70 MB | 2 MB |
| Age rating | 17+ | 17+ |
| Developer | CAPNKLUTCH | Vishal Agrawal |
In-app purchases
Flex
- Premium Monthly$13.991 Month
- Premium Annual$39.991 Year
The Plus Set
No in-app purchases








