01
Set your constraints
Share your goal, equipment, and available time. When you ask for advice, the coach can refer to your workout history and permitted recovery information.
LENJO · LOCAL-FIRST AI FITNESS COACHYour next session,without the guesswork.
Training history, load, reps, RPE, and recovery signals come together in one decision you can act on today.
REAL TRAINING DATA · IPHONE / APPLE WATCH · LOCAL-FIRST
HOW LENJO COACHES →ADD LOAD
LOAD UP?
HOLD
HOLD?
DELOAD
DELOAD?
00 — THE QUESTION
READ THE SIGNALS
Read the body.Then train.
Lenjo reads your training history, set-by-set RPE, sleep, HRV, and soreness—then turns those signals into one decision for today.
SLEEP
6H 12M
HEART RATE VARIABILITY
−12% BELOW BASELINE
UPPER-BACK SORENESS
3/5
LAST PULL SESSION
45KG × 8 @ RPE 8
APPLE WATCH · LIVE HR 98 · READY
01 — READ THE SIGNALS
PLAN EXAMPLE
Today’s trainingis a decision.
Illustrative plan adjustments. Review the suggestions against your saved workouts and how you feel before adopting them.
Leave reps in reserve and maintain technique
Drop one set per exercise and keep every rep clean
Heavy bent-over row → switch to a supported variation
Stop for sharp pain and reassess tomorrow morning
02 — THE DECISION
THE LOOP
Finish the session.Then the decision begins.
Every set—load, reps, and RPE—becomes input for what comes next. Lenjo closes the loop: your training history is the algorithm.
DECIDE
STEP 01
EXECUTE
STEP 02
RECORD
STEP 03
ADAPT
STEP 04
LOOP CLOSED
SESSION
00:00
SETS COMPLETED
00 / 12
03 — THE LOOP
THE ADAPTATION
Next time,start with your log.
Review saved sets and recovery context with the coach to discuss load, reps, and rest. Check the suggestions and confirm any changes before training.
READINESS IS A TRAINING REFERENCE, NOT A MEDICAL METRIC.
ADD LOAD
HOLD
DELOAD
SWAP
EXAMPLE · Repeated targets met? Discuss a load increase.
EXAMPLE · Near your limit? Review whether to hold the load.
EXAMPLE · Low readiness? Review context before reducing volume.
EXAMPLE · Equipment unavailable? Discuss a suitable alternative.
HEART RATE · DEMO
116RECOVERING
Review before you train.
APPLE WATCH · RECOVER → ACTIVE
04 — THE ADAPTATION
BEGIN
Built for self-coached athletes.
01
TRAIN ALONE, NOT BLIND.
PRINCIPLE 01
02
EVERY KILOGRAM, EARNED.
PRINCIPLE 02
03
RECOVERY IS TRAINING.
PRINCIPLE 03
STRENGTH, DECIDED.
Turn every session into evidence for the next.
IPHONE · APPLE WATCH · AVAILABLE NOW ON THE APP STORE
05 — BEGIN
06 · AI FITNESS COACH · TRAINING KNOWLEDGE
An AI fitness coach, specific to your next workout.
Lenjo is an AI fitness coach and strength workout log for iPhone, with optional Apple Watch support. Ask for a plan, review it, log each set, and use your saved results when planning the next workout.
LENJO AT A GLANCE
- Devices
- For iPhone with iOS 17 or later. Apple Watch with watchOS 10 or later is optional; you can log workouts without a watch.
- Free and Pro
- iPhone workout execution and logging are free, with an AI trial allowance. Pro adds Watch workout execution, higher AI allowances, and in-depth reports.
- Records and AI
- Core records stay mainly on-device. AI coaching and photo analysis require internet access and send relevant content to third-party model services.
- Your decisions
- Review the plan, then log what you complete in each set. AI provides suggestions; you choose the exercises, load, and whether to continue.
See the App Store listing and privacy policy. Current prices and allowances are shown in the app.
02
Review, then train
Check and edit the exercises, sets, and targets, then log actual load, reps, and RPE on iPhone. Pro users can also send the plan to Apple Watch.
03
Save and review
Confirm and save the sets you completed, then revisit them in the calendar. Use those records when you next ask the coach about progression or adjustments.
06 · TRAINING GUIDES
Make each training question concrete.
Switching from an app that plans for you? Read how Lenjo works as a Fitbod alternative with a coach you can ask.
G.01
PLANNING
AI Strength Training Plan
Review an AI strength training plan, log actual sets, save your workout, and ask Lenjo for a follow-up review. Includes a worked example and iPhone versus Apple Watch Pro roles.
READ GUIDE
G.02
PROGRESSION
RPE Workout Planner
Learn how RPE and reps in reserve add context to load and reps, when to progress, hold, or reduce, and why one RPE score should not control the whole plan.
READ GUIDE
G.03
RECOVERY
Apple Watch Next-Set Readiness
See how Lenjo Pro combines Apple Watch heart-rate decline, elapsed rest, previous-set performance, and minimum-rest safeguards to guide next-set readiness.
READ GUIDE
G.04
PLANNING
Adaptive Workout Plan
An adaptive workout plan keeps the training structure stable while adjusting load, reps, sets, or exercises from completed performance and recovery context.
READ GUIDE
G.05
PROGRESSION
Workout Log Analysis
Track exercise, set-level load, reps or duration, completion, RPE, and recovery timing so each workout can produce a specific next-session adjustment.
READ GUIDE
G.06
RECOVERY
How Long to Rest Between Sets
Compare rest intervals for heavy compound lifts, hypertrophy work, and isolation exercises, then use reps, RPE, and movement quality to adjust.
READ GUIDE
FAQ · 06
Before your first session.
Product capability, data boundaries, and the decisions that always remain yours.
01Can I use Lenjo without an Apple Watch?＋
Yes. You can review a plan, train, log each set, and save the workout on iPhone. Apple Watch is optional. Lenjo Pro users can send a plan to a paired watch with Lenjo installed and log the session on their wrist. Heart-rate features also need the relevant Apple Health permissions and available data.
02What is free, and what does Lenjo Pro include?＋
iPhone workout execution and logging are free, with an allowance to try AI features. Lenjo Pro includes Apple Watch workout execution, higher AI coaching and photo-analysis allowances, and in-depth reports. Check the subscription screen in the app for current prices, limits, and entitlements.
03How does Lenjo differ from a fixed workout plan?＋
A fixed plan follows a preset template. When you ask Lenjo for training advice, the AI coach can refer to recent sessions, actual load, reps, RPE, completion, and permitted recovery signals to suggest changes and explain them. You review the plan and decide how to train.
04Can I start training from the generated plan?＋
Yes. Review and edit the structured plan on iPhone, then confirm actual load, reps, and RPE set by set. Lenjo Pro can also send the plan to Apple Watch for wrist-based execution and between-set recovery guidance.
05Does Lenjo diagnose pain or injuries?＋
No. Lenjo does not diagnose injuries, provide treatment, or guarantee training outcomes. Stop the relevant movement and seek qualified help for unusual pain or symptoms.
06Does all of my training and health data leave the device?＋
No. Core records are stored mainly on-device. AI coaching and photo analysis require an internet connection; relevant content is processed by third-party model services as described in the privacy policy. You can decline AI processing and continue local training and logging.
Your next session, decided.
Lenjo is available for iPhone and Apple Watch.
07 — PRIVACY & BOUNDARIES · TRUST
Intensity follows the data. Boundaries stay with you.
Readiness is estimated from heart-rate and training signals to guide training rhythm. It is not a medical metric, and Lenjo does not diagnose injuries or health conditions.
01
Core records stay local-first
Workouts, body metrics, nutrition, chats, and long-term memory are stored mainly on your device. Logging and training never require AI.
02
Permission stays optional
Sign in with Apple and Apple Health access are optional. Decline AI processing and you can still train, backfill sessions, and keep local records.
03
You see what gets sent
Only when you choose AI coaching or photo analysis is the necessary content securely processed by third-party model services.
04
No advertising tracking
Lenjo does not use your data for advertising tracking. You can review, export, or clear your records in the App.