Cornerstone Strength

STOP GUESSING. TRAIN WITH CONFIDENCE.

Cornerstone Strength helps you know what to do next, and understand why.

Every set you log becomes useful context: what the plan called for, how you performed, how hard it felt, and how your training is trending. Cornerstone turns that context into clear guidance while keeping you in control.

KNOW WHAT TO DO NEXT

Get your next weight, sets, and reps suggested right on the workout screen. Smart Suggestions use your recent performance, logged effort (RPE/RIR), time between sessions, and program targets.

Every suggestion includes a plain-language reason. Apply it with one tap, adjust it, or keep your plan. It is a starting point, not a rule.

EVERY WORKOUT HAS A PURPOSE

Choose from programs written by real strength coaches using proven periodization for strength, hypertrophy, athleticism, or a mix. Enter your numbers and train, customize a program, or build your own from scratch.

Percentage-based programs calculate working weights from your training maxes automatically, so the plan is ready when you are.

SEE THE TREND BEFORE THE NEXT PR

Understand whether the work is working:

- Estimated 1RM (e1RM) trends
- Training volume by muscle group
- Weekly volume and muscle-balance insights
- Personal-record history and automatic PR detection
- Workout consistency and streaks
- Month, 3-month, year, and all-time views

LOG WITHOUT LOSING YOUR FLOW

- Weight, reps, RPE, RIR, and AMRAP support
- Previous performance beside today’s set
- Structured program sessions or quick workouts
- Background rest timer with audio and vibration alerts
- Exercise swaps, notes, and duration tracking
- Band tracking for accommodating resistance
- Apple Health workout sync

500+ EXERCISES

Find movements for a commercial gym, garage gym, or anywhere in between. Browse by muscle group or equipment, including barbells, dumbbells, kettlebells, machines, cables, bodyweight, trap bars, specialty bars, and more.

SHARE THE WORK

Turn a completed workout into a clean card with PRs, top lifts, and muscle-group balance. Share it to Instagram Stories, save it to Photos, or send it to a training partner.

START WITH 30 DAYS OF PRO- FREE

Every new account gets 30 days of Cornerstone Pro with every program, Smart Suggestions, and full analytics unlocked. No credit card required. When the 30 days end, keep logging free forever or subscribe to keep Pro.

BUILT FOR LIFTERS

- Dark and light themes
- Fast, focused interface
- No ads

Cornerstone does more than remember what you lifted. It helps the next training decision feel clear.

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Subscription details:
- Cornerstone Pro Monthly: $7.99/month
- Cornerstone Pro Annual: $49.99/year

Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless it is 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 subscriptions by going to your account settings on the App Store after purchase.