The only workout app that tells you how your cardio is affecting your lifts.
Track strength sets, log GPS cardio, and see how your training connects — all from your iPhone and Apple Watch.
Free to download · No accounts. No cloud. No tracking.
The question two apps can never answer.
StrengthAnalytics correlates your weekly cardio volume with your strength PRs over a rolling 12-week window — so you finally know whether your running is helping your gains or quietly killing them.
See it in action.
Straight from the actual app. Swipe to explore.
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Most apps end your workout with a checkmark.
You just moved a few thousand pounds. Here's what that deserves instead.
Every PR, flagged before you leave the floor.
End a session and land on the whole picture: each new personal record with its estimated 1RM, total volume, sets, heart rate — and a MuscleMap heatmap of which muscles did the work. Your week streak sits right there too, keeping the habit honest.
Type 185. Watch the plates load themselves.
No math mid-set. Enter a target weight and the Plate Loading Sheet shows the exact plates for each side — minimum count, your bar, your units. Can't build the number from your plates? It snaps to the closest weight you can load and tells you the difference. And your 2.5 lb jumps stay 2.5 lb everywhere — history, PRs, trends. Nothing gets rounded away.
Your running, as serious as your lifting.
However you run — an open run, to a distance or time goal, or in structured intervals — every run gets a full breakdown and lands in one place, right next to your lifts.
Every mile, mapped and measured.
Open any run and see the whole story: your route on the map, GPS splits for every mile or kilometer, your elevation profile, and your time in each heart-rate zone. Run twice in one session? Each run keeps its own route, splits, and pace. An hour-plus Watch run keeps its full map when it lands on your iPhone. The depth you'd expect from a dedicated running app — living in the same place as your lifts.
Serious about the running side.
Structured intervals, distance and time goals, a full run log, and your fitness over time — on iPhone and Apple Watch.
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Up and running in 60 seconds.
Build a workout, track it, and see what your training is telling you.
Build your workout
Pick from 403 exercises — 379 with illustrated thumbnails, so you're never guessing which movement an app means. Strength, cardio, or both in one session. Save it as a template, or chain workouts into a Routine that auto-advances to your next session.
Track from your wrist or your pocket
Log sets with the Digital Crown on Apple Watch. Run with GPS and live pace from your wrist. Or track everything from your iPhone — your call.
See how your training connects
Cross-Training Impact shows whether your cardio is helping your lifts or hurting them. On-device AI reads your real HealthKit data — heart rate, sleep, recovery — and shows you what's working.
Built for athletes who train both ways.
A serious workout tracker for lifting, running, cycling, hiking, and everything in between.
Strength + Cardio in one workout
Log a treadmill warmup, then your squats, then a cooldown ride — all in a single session. 403 exercises, GPS routes, full history.
Full Apple Watch companion
Log sets with the Digital Crown. Live heart rate, mile-split haptics, and rest timers from your wrist. Syncs back to iPhone automatically.
On-device AI analysis
Apple Intelligence reads your real training data — heart rate, sleep, recovery — and surfaces what's actually working. No cloud calls. No generic advice.
Your data stays yours
No accounts, no cloud sync, no third-party analytics. Built on SwiftData and HealthKit. Everything lives on your device.
Free to log. Premium to grow.
Unlimited workout logging, GPS routes, and Apple Watch tracking — free forever.
Upgrade for AI insights, cross-training analysis, and unlimited templates.
Questions
The stuff people ask before they download.
Do I need an Apple Watch?
No. The full app works on iPhone alone — workout logging, GPS cardio, history, insights, everything. The Apple Watch companion is there if you want hands-free logging and live heart rate, but it's optional.
Where is my workout data stored?
On your device. StrengthAnalytics has no cloud database, no user accounts, and no third-party analytics. Your workouts live in SwiftData on your iPhone, and HealthKit data stays where Apple keeps it. Nothing is uploaded.
How does Cross-Training Impact actually work?
Over a rolling 12-week window, the app looks at your weekly cardio volume alongside when your strength PRs occur. It surfaces one of three states: Complementary (cardio is helping), Possible Interference (cardio may be hurting strength), or Strength Dominant (you're not doing enough cardio to measure impact). It's the interference effect, made visible.
Is it good for Hyrox or hybrid training?
Yes — that's exactly who it's built for. Mixed sessions (strength + cardio in one workout) are a first-class concept, not an afterthought. GPS, splits, rest timers, and the full strength logger all live in one place.
How deep is the running tracking?
Deep. Every run gets a route map, GPS-derived per-mile and per-kilometer splits, an elevation profile, and a heart-rate-zone breakdown — plus a Run Log of your full history and a Running Fitness insight tracking your VO₂max and pace-per-heart-rate efficiency over time. The difference from a standalone running app: here your runs sit next to your lifts and feed the same analysis, so you can finally see how the two affect each other.
What's free vs. paid?
Free: unlimited workout logging, GPS route tracking, Apple Watch companion, full history, and the dashboard with five report cards. Paid ($5.99/mo, $34.99/yr, or $89.99 lifetime): seven AI insight cards including Cross-Training Impact, unlimited templates, and HealthKit-powered recovery and nutrition data in your reports.
How do I get support or send feedback?
Email info@strengthanalytics.ai. Built solo by an indie developer — every message gets read, usually answered within 24 hours.
Ready to see how your training connects?
Free to download. No account required.
Download on the App Store