Comparison

MUSCL vs IronZenkai

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

Head to head
About

MUSCL

Features
Read full description

MUSCL is AI-powered Physique Intelligence. Analyze your physique, identify weak points, and generate a personalized hypertrophy program designed for your body. • AI Physique Analysis • Weak Point Detection • Smart Training Programs • Adaptive Progression • Intelligent Workout Tracking Stop guessing. Start building your physique intelligently. Subscription Terms • Payment will be charged to your Apple ID account at confirmation of purchase • Subscription automatically renews unless 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 subscriptions in your App Store account settings Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mature-asp-ac5.notion.site/MUSCL-Privacy-Policy-33b25b14d842801ea15cc5407aa21318?source=copy_link

About

IronZenkai

This app combines workout tracking with calorie and macro monitoring, offering AI-driven coaching based on your training and nutrition data. It features automated program planning, progressive overload suggestions, and photo-based meal logging to help you achieve your fitness goals.

Highlights
  • Automated mesocycle training programs
  • Adaptive progressive overload
  • Fast set logging with RIR and rest timer
  • Photo food logging with calorie/macro analysis
  • AI coach for personalized advice
  • Progress photo timeline
  • Offline functionality
Features
Read full description

Train with real science. Eat for your goals. Track it all in one app. IronZenkai is a workout tracker and gym log built on real training science — not just a set counter — with calorie and macro tracking built in. Plan periodized programs, log every set, snap a photo of your meals, and let your AI coach tie it all together. No second app. No account needed to start. TRAIN SMARTER - Auto-built mesocycle programs (full-body, upper/lower, push-pull-legs and more) matched to your goal, experience, and equipment - Progressive overload that adapts: smart weight, set, and rep suggestions from your last workouts - Fast set logging with RIR, a built-in rest timer, and pre-workout check-ins that tune each session to your energy - Automatic deloads and a guided "plan your next block" flow — never guess what's next - Full exercise library with form guidance and one-tap swaps EAT FOR YOUR GOALS - Photo food logging: snap your plate to get calories and macros, analyzed on-device on supported iPhones - Barcode scanner and a searchable food database - Adaptive TDEE that learns from your weight trend and adjusts your daily targets - Build meals and daily plans that hit your protein, carbs, and fat - Real-time calorie pacing: always know what's left and what to eat MEET ZEN, YOUR COACH - An AI coach that sees your training, nutrition, and weight together - Ask anything: why the scale stalled, what to eat with calories left, how to train around a sore joint - Answers grounded in your real data — not generic advice SEE YOUR PROGRESS - Progress photo timeline with start-to-now comparisons - Weight and strength charts, streaks, and weekly summaries - Milestone share cards and home-screen widgets BUILT RIGHT - Start instantly — no sign-up required - Works offline and syncs when you're back online - Your data stays yours MEMBERSHIP IronZenkai is free to use. An optional membership — a one-time Lifetime purchase or an auto-renewing subscription — unlocks premium coaching and cloud features. Price and length are shown in the app before you buy. Subscriptions auto-renew unless turned off at least 24 hours before the period ends; manage or cancel anytime in your Apple ID settings. Terms of Use: https://ironzenkai.com/terms Privacy Policy: https://ironzenkai.com/privacy Support: support@ironzenkai.com

Screenshots

MUSCL4 screens
IronZenkai4 screens

Verdict

The call

MUSCL and IronZenkai are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. MUSCL sells 2 in-app purchases, starting at $19.99 per month and IronZenkai sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

MUSCL ships an update every 4 days, IronZenkai every 5 days. Both last shipped on November 5, 2026.

ScorecardNo meaningful differences
MUSCL versus IronZenkai: the parameters behind the verdict, then further details
ParameterMUSCLIronZenkai
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.1 — better15.5
Further details — not scored
Size59 MB167 MB
Age rating17+12+
DeveloperIKARUS PTY LTDMelovin Pedida

In-app purchases

2 purchases

MUSCL

Subscriptions2
  • MUSCL Monthly7 Days trial$19.991 Month
  • MUSCL Annual3 Days trial$99.991 Year
3 purchases

IronZenkai

Subscriptions2
  • IronZenkai Premium$1.991 Month
  • IronZenkai Premium (Yearly)$19.991 Year
One-time1
  • IronZenkai Lifetime$9.99

Questions

Is MUSCL free?
MUSCL is free to download, with in-app purchases available.
Is IronZenkai free?
IronZenkai is free to download, with in-app purchases available.
Do MUSCL or IronZenkai have ads?
Neither MUSCL nor IronZenkai shows ads.
Which is updated more often, MUSCL or IronZenkai?
MUSCL ships an update every 4 days, and IronZenkai every 5 days. Most recently, MUSCL was updated on November 5, 2026 and IronZenkai on November 5, 2026.

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