STRNTH vs RoundShift
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STRNTH
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16 progressive programmes with planned deloads. Track every lift with 1RM, PRs and plateau alerts. Run HIIT with live heart rate. Get a weekly AI coach. Import your training history from another app. Strength training built for lifters in their 30s, 40s and beyond. Most apps are written for 25-year-olds. STRNTH is for people who have lifted before, or are starting now, and want to train for the long game. Open the app, your session is ready, and log a set in two taps. Free forever No card required, no time limit. These features stay free. - Workout logging across sets, reps and weight, including bodyweight, assisted and added load - Built-in programs with multi-week blocks and deloads baked in - Two-tap exercise swaps mid-workout - Rest and tempo timers with voice cues - HIIT preset library with Bluetooth heart rate and smart-trainer support - Body composition with caliper body fat, waist to height and fuel guidance - The STRNTH Index, PRs by muscle group and a year-long trend line - Customisable home dashboard with drag-and-drop widgets - Fatigue-aware readiness chip based on training stress and age - Ask STRNTH library of curated answers on training, recovery and nutrition - Workout history with charts, PR badges and exercise breakdowns - Progress photos with a before and after compare, locked behind Face ID - Import your workout history from other workout apps - Cardio logging for runs, rides, walks and swims, with pace and distance - Quick workouts and targeted sessions by muscle group or time - Adaptive resistance that holds your heart-rate zone on a smart trainer - Training block reviews with a shareable summary after each block - PT summary to hand your numbers to a personal trainer STRNTH Plus (Requires paid plan) Add custom content and unlock the full catalogue. - Custom programs: design a 4, 8 or 12 week block with your own splits and lifts - Custom workouts built from scratch - Custom HIIT with your own blocks and timing - Add your own exercises with muscle group tagging - Full program catalogue and full training history - Log workouts retroactively on past dates STRNTH Pro (Requires paid plan) Everything in Plus, with cloud backup and the age-aware AI coach. - Cloud backup. Sync across devices, reinstall without losing data - Age-aware AI coaching weekly review of readiness, training density and recent volume - Ask STRNTH AI: free-form questions answered with your last six months of training - Save adapted workouts when you change exercises mid-session - Plateau coaching when a lift stalls - Build this week from your recent training - Community programs: publish and enroll with other Pro members - Connect your AI assistant (beta, Pro) and build strength workouts, programmes and HIIT sessions - Build workouts and HIIT with AI by describing them in plain words Paid plan details STRNTH Plus and STRNTH Pro are auto-renewing paid plans, billed monthly or yearly. Payment will be charged to your Apple ID account at the confirmation of purchase. Your paid plan automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your paid plan in your account settings on the App Store. STRNTH is built by Billy, a developer-lifter who got tired of fitness apps that treated him like a 22-year-old. Quiet by design. Honest about pricing. Built for the long game. Terms of use: https://strnthapp.com/terms Privacy policy: https://strnthapp.com/privacy
RoundShift
This interval timer app provides voice coaching for various workout types, allowing you to keep your eyes on your exercise rather than the screen. It offers customizable presets, multiple voice options, and can even display workouts on a larger screen for group sessions. Advanced features like adaptive rest and Apple Health integration are available with a Pro upgrade.
- Voice coaching for workouts
- Customizable interval presets
- Plain language workout builder
- Multi-language coach voices
- Screen-off and face-down operation
- AirPlay for group sessions
- Adaptive rest with Apple Watch
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The interval timer you don't have to look at. RoundShift calls out every round — get ready, work, rest, half way, last round — so your eyes stay on the workout, not the screen. BUILT IN SECONDS • Tabata, HIIT, EMOM, strength presets — or design your own • Warm-up, custom intervals, unlimited rounds • Describe a workout in plain words and let RoundShift build it VOICE THAT COACHES • Real coach voices in 10 languages — or calm and hype styles • 89 exercise names spoken aloud in custom workouts • Works with the screen off, phone face down, music playing COACH MODE ON THE BIG SCREEN • AirPlay the countdown to any TV for group sessions and classes • Giant display the whole room can read APPLE WATCH + ADAPTIVE REST (PRO) • Full timer on your wrist with live heart rate • Rest that adapts: end rest early when your heart rate recovers, or extend it when you need more • Workouts logged to Apple Health with the right activity type SEE YOURSELF SHOW UP • Streaks, weekly minutes, and a calendar of every session • Home Screen widgets and quick actions NOT JUST FOR THE GYM • Box breathing and breathwork: 4-4-4-4 in seconds • Stretch and physio holds with spoken changeovers • Focus sprints for study and deep work • Anything that repeats: intervals are intervals RoundShift is free forever for running timers and built-in workouts. RoundShift Pro (one-time purchase, no subscription) unlocks saved workouts, stats, widgets, and Apple Watch.
Screenshots
Verdict
The clearest difference is update cadence: RoundShift at every 2 days against STRNTH's every 5 days. On price, ads, in-app purchases 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. STRNTH sells 5 in-app purchases, starting at $4.99 per month and RoundShift sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
STRNTH ships an update every 5 days, RoundShift every 2 days. The most recent releases landed on September 18, 2026 and September 30, 2026 respectively.
| Parameter | STRNTH | RoundShift |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 74 MB | 143 MB |
| Age rating | 4+ | 4+ |
| Developer | Next Big Leap Ltd | Carl Law |
In-app purchases
STRNTH
- STRNTH Plus Monthly$4.991 Month
- STRNTH Pro Monthly$14.991 Month
- STRNTH Plus Annual$44.991 Year
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- STRNTH Pro Founder Yearly$54.991 Year
- STRNTH Pro Yearly$99.991 Year
RoundShift
- Intervo Pro (Lifetime)$4.99









