Comparison

zRep vs JustBB Strength Training Log

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

zRep

This strength training app offers fast workout logging, a supportive community, and an AI coach for personalized training and nutrition guidance. It provides unlimited logging, templates, and progress tracking without any ads or required subscriptions.

Highlights
  • Unlimited workout logging
  • Workout templates and history
  • Rest timer and plate calculator
  • Apple Watch companion app
  • Community feed and accountability
  • AI coach for training and nutrition
  • Progress charts and milestones
Features
Read full description

EARN YOUR REPS zRep is a free strength training app for the gym floor—fast logging, Community, and an AI coach that helps with your training and nutrition. No ads. No subscription required. TOTALLY FREE • Unlimited workout logging (sets, reps, weight, RPE) • Unlimited templates & full history • Rest timer · exercise library · plate calculator • Apple Watch companion (mirror + remote—phone is source of truth) • Cloud sync when you sign in · Apple Health • Community, AI coach, and nutrition—included, not locked behind Pro COMMUNITY Create a free account, follow lifters by code, and see finished sessions in the feed. Like and comment. Mutual follows unlock Compare PRs and nudges so you can stay accountable without a group chat. AI COACH & NUTRITION Build a coach plan around your goal (build muscle, get stronger, lose fat, and more). Chat with zRep AI to adjust for the equipment you have and swap exercises you can actually do. Pair training with a nutrition plan in the same app. WORKOUT LOGGING Log between sets without fighting the UI. Track weight, reps, RPE, and notes. Rest timer keeps you on pace. Finish a session and see what you earned. TEMPLATES & PROGRESS Save routines you repeat. Start from a template and train. History, charts, and milestones so you know if the numbers are climbing. APPLE WATCH Glance at the live session, start rest, pause, or finish from your wrist—built as a gym-floor remote, not a separate logging app. WHO IT’S FOR Strength lifters and gym-goers who want a fast log plus Community and coaching tools—without paying to unlock the basics. Privacy, support, and terms: https://zrep.kz-minds.com

About

JustBB Strength Training Log

Read full description

JustBB is the cleanest, most powerful log for lifters who actually train hard. Completely free. No subscriptions. No account. No ads. Your data stays on your iPhone. — Core features — • Build exercises, supersets, and custom per-set targets your way • Categories and equipment for every exercise • Automatic dropset detection • Auto-fills weights and reps from your previous sessions • Per-set rating (easy / moderate / hard / failure) • Session tonnage and per-exercise personal records • Rest timer (runs on the lock screen) • Nested folders for a large training library • Drag & drop, search, dark mode, fully offline • Kilograms and pounds • Full session history and per-exercise history — Data and privacy — • Stored locally on your device • Backups to iCloud Drive • One-tap restore

Screenshots

zRep4 screens
JustBB Strength Training Log4 screens

Verdict

The call

The clearest difference is in-app purchases: JustBB Strength Training Log at none against zRep's 3. zRep's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. zRep sells 3 in-app purchases, starting at $4.99 per month. JustBB Strength Training Log asks for nothing beyond the download.

UpkeepUpdate frequency

zRep ships an update every 5 days, JustBB Strength Training Log weekly. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
zRep versus JustBB Strength Training Log: the parameters behind the verdict, then further details
ParameterzRepJustBB Strength Training Log
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 days — betterWeekly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.6 — better17.0
Further details — not scored
Size21 MB13 MB
Age rating4+4+
DeveloperSeifeldin ZookAndrew Olefira

In-app purchases

3 purchases

zRep

Subscriptions2
  • zRep Pro$4.991 Month
  • zRep Pro$29.991 Year
One-time1
  • zRep Pro — Lifetime$79.99
None

JustBB Strength Training Log

No in-app purchases

Questions

Is zRep free?
zRep is free to download, with in-app purchases available.
Is JustBB Strength Training Log free?
JustBB Strength Training Log is free to download, with no in-app purchases.
Do zRep or JustBB Strength Training Log have ads?
Neither zRep nor JustBB Strength Training Log shows ads.
Which is updated more often, zRep or JustBB Strength Training Log?
zRep ships an update every 5 days, and JustBB Strength Training Log weekly. Most recently, zRep was updated on October 31, 2026 and JustBB Strength Training Log on October 25, 2026.

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