RIR-based progressive overload suggestions, program tracking, and an AI coach that knows your full training history. For intermediate lifters who've outgrown Strong or a spreadsheet.
Strong and Hevy tell you what you lifted. They don't tell you whether to add weight next week, whether your volume trend is heading in the right direction, or whether you're leaving gains on the table. Spreadsheets give you control but zero intelligence. Most intermediate lifters bridge this gap manually — cross-referencing logs, doing math in their head, guessing. stimulus closes that gap.
Sets, reps, RIR. Same speed as any other app. Works offline — no connectivity required mid-session.
stimulus reads your RIR trends across sessions and tells you exactly what to load next time. No guesswork.
PRs, weekly volume, program progress. Your AI coach sees all of it — not just your last session.
34 templates or build your own. Not locked into a fixed system like RP Hypertrophy or Juggernaut AI.
Suggestions based on actual proximity to failure — not arbitrary percentage jumps or fixed weekly increments.
Import from Strong, Hevy, Garmin FIT files, or screenshot import. Your training history comes with you.
Export everything as CSV or JSON at any time. Works offline as a PWA. No lock-in.
Knows your full training history, current program, and recent trends. Not a generic chatbot.
Strava integration live. Garmin FIT import. More wearable integrations on the roadmap.
| Strong / Hevy | RP / Juggernaut | Garmin / Whoop | stimulus | |
|---|---|---|---|---|
| Clean logging UX | ✓ | ✗ | Partial | ✓ |
| RIR-based progression | ✗ | ✓ | ✗ | ✓ |
| Bring your own program | ✗ | ✗ | ✗ | ✓ |
| AI coach with full history | ✗ | Partial | Partial | ✓ |
| Works offline | ✓ | ✗ | ✓ | ✓ |
| Data export | ✓ | ✗ | Partial | ✓ |
stimulus is in active development. beta users get early access, direct input on the roadmap, and founding member pricing when we launch.
Join the waitlistNo credit card. No noise. Your data is always exportable.