Comparison

UnderForge vs TANK

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

Head to head
About

UnderForge

Features
Read full description

UnderForge is a personal fitness and longevity coach that builds a fully customized action plan around your body, your goals, and your life. Then guides you every step of the way and makes it easy to track progress. Whether you want to build muscle, burn body fat, increase strength, or simply get challenged by a world-class program, UnderForge forges a plan that is yours alone. CHOOSE YOUR GOAL Burn body fat Build muscle mass Increase strength Get challenged by your coach HOW IT WORKS When you join, your coach gets to know you. You'll answer a focused set of questions about your training experience, physique, schedule, nutrition, sleep, stress, and existing pain. Your coach then uses that full picture to generate a personalized hypothesis about your biggest obstacles and builds a prioritized, step-by-step action plan designed to break through them. You can review the plan and ask for revisions. This is your forge. HUMA OR AI COACH ALWAYS ON Choose between an AI-only plan and a human + AI plan. AI-only is fully complete and you have all the tools you need to achieve your goals. Human + AI plans adds a boost to accountability and even more personal touch. You decide. Ask about any step in your plan, request a technique breakdown, nutrition targets. Your coach remembers your full profile and adapts every response to your situation. Weekly check-ins keep your plan current. Progress is tracked right inside the app — no need for spreadsheets or additional trackers. CONSISTENCY SCORE AS PRIORITY Most important is that you achieve consistency, therefore we created a unique score to help you stay consistent. The score is higher as you log workouts and meals. This score will also incorporate sleep and breathwork routines and adherence. TRAINING, NUTRITION AND RECOVERY SIMPLIFIED Training — Personalized programming around your schedule, progressive overload, and warm-up protocols. Tailored to gym, home, or park training and available equipment. Nutrition — Macro and calorie targets and guidelines based on your goals and body composition and preferences. Supports all dietary styles vegan, keto, halal, gluten-free, etc. Recovery — Sleep and stress protocols, supplement guidance, and mobility recommendations that keep you performing. Logging — Log workouts easily and meals with photos or text. BUILT FOR REAL PEOPLE From complete beginners to athletes with 10+ years of training, nutrition and longevity expertise, UnderForge adapts to your experience level, your available equipment, your dietary restrictions, and even the areas of your body you want to prioritize. Your plan is not a generic template. It is engineered for you. MUSCLE. LONGEVITY. FORGED. Privacy Policy: https://www.underforge.app/privacy-policy.php Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula

About

TANK

This AI-powered fitness app provides detailed technique analysis for various exercises, from weightlifting to sports. It offers personalized training programs, automatic workout tracking, and integrates with Apple Health for a comprehensive fitness experience.

Highlights
  • AI technique analysis with form scoring
  • Extensive exercise library (604 exercises)
  • Personalized and ready-made workout programs
  • Automatic workout data tracking
  • Integration with Apple Health and heart rate monitors
  • Multiple analysis levels (Quick and Deep)
  • Exercise instruction videos and camera guides
Features
Read full description

The whole training log is free. No limits, no time restriction. 293 programs, 119 ready-made workouts, 984 exercises and four training modes — all open from the start. Premium gives you the AI and statistics with no time limit. TANK analyses your technique on film and scores it 0–100. Gym, running and 33 sports. EVERYTHING IS LOGGED AUTOMATICALLY Weight, reps, rest, RIR and percentage of 1RM are saved while you train. See the history of every session, your personal records and how you develop over time. Cardio is logged in minutes or distance with its own history. WORKOUT TYPES AND TIMING Circuit: large timer, voice cues and automatic start of the next round Run: GPS with distance, pace and intervals. The voice reads out time and pace at every kilometre, so you never have to look at the screen Race: stopwatch for race simulation with record tracking Rest timer between sets AI ANALYSIS OF YOUR TECHNIQUE Film an exercise for 10–15 seconds. The AI reads your movement, gives it a technical score and points out exactly what is good and what you should change — rep by rep, with time-stamped feedback. WELLNESS ALLOWANCE TANK qualifies for the Swedish wellness allowance. Buy through the App Store and hand the Apple receipt to your employer — for many people the app ends up free in practice. YOUR OWN AI COACH Tell it your goal — get stronger, lose weight, build muscle — and the coach builds a plan for you on the spot. It knows your training history and answers anything about technique, structure and progression. Already have a program? Paste it in or photograph it and it is rebuilt inside the app. The exercises are recognised whatever you call them — bench, deadlift, squat or Kniebeuge. 984 EXERCISES IN SIX CATEGORIES Strength: squat, deadlift, bench press, olympic lifts, strongman and calisthenics Gym: machines, dumbbells, cable, EZ bar, isolation Cardio: running, walking, swimming, treadmill, cycling, hiking Sports: 33 sports, among them tennis, football, golf, climbing, padel, swimming Martial arts: boxing, karate, judo, wrestling, Muay Thai, BJJ, MMA Mobility: yoga, stretching, warm-up, rehab, pilates Every exercise has a technique video, tips and camera guidance. 293 PROGRAMS AND 119 READY-MADE WORKOUTS Every program is built on training research and the originals. Effort rises week by week, with deloads where they help and a taper before tests and races. New programs for a PR in squat, bench press, deadlift and overhead press. Filter by goal, level or category, or let the AI build a program for you. RUNNING RECORDS AND BADGES Best time per distance from 1 km to marathon. Eight badges to chase, from your first run to 500 kilometres in total. SEE WHAT YOU ACTUALLY TRAIN A body map shows how your volume is spread across the muscle groups — choose a period from seven days to since you started. Easy to see if your back has fallen behind. Track body weight and body measurements, left and right. APPLE WATCH AND APPLE HEALTH Run the session straight from the watch with heart rate and GPS. An ongoing session shows on the lock screen and in the Dynamic Island. Sessions sync to Apple Health. YOUR DATA STAYS WITH YOU Signing in is optional. All data is stored locally on your device — sign in with Apple or Google only if you want to sync between devices. PRICE Free to download. Programs, workouts, exercises, all training modes and the logbook are free, with no time limit. Premium gives you the AI — technique analysis of your films, the coach that answers anything, and programs built for you — plus statistics with no time limit. Statistics up to 90 days are free. Four levels: Light, Basic, Plus and Pro. New subscribers can start with a free trial — the App Store shows the length and the price before you confirm. Support: support@getmycoach.app https://getmycoach.app Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://getmycoach.app/privacy.html

Screenshots

UnderForge4 screens
TANK4 screens

Verdict

The call

The clearest difference is in-app purchases: UnderForge at none against TANK's 10. TANK's advantage is update cadence (every 3 days vs every 9 days). On price, ads, device support 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. TANK sells 10 in-app purchases, starting at $5.99 per month. UnderForge asks for nothing beyond the download.

UpkeepUpdate frequency

UnderForge ships an update every 9 days, TANK every 3 days. The most recent releases landed on September 28, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 8 level
UnderForge versus TANK: the parameters behind the verdict, then further details
ParameterUnderForgeTANK
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 9 daysEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.115.0 — better
Further details — not scored
Size126 MB119 MB
Age rating17+4+
DeveloperVenture CO Group Korlatolt Felelossegu TarsasagROBERT GUNNAR BARKLUND

In-app purchases

None

UnderForge

No in-app purchases

10 purchases

TANK

Subscriptions7
  • GetMyCoach Basic1 Month trial$5.991 Month
  • GetMyCoach Plus$7.991 Month
  • GetMyCoach Pro$9.991 Month
Show 4 more
  • GetMyCoach Light$49.991 Year
  • GetMyCoach Basic$59.991 Year
  • GetMyCoach Plus$79.991 Year
  • GetMyCoach Pro$99.991 Year
One-time3
  • GetMyCoach Credits Smal$2.99
  • Medium Pack$5.99
  • GetMyCoach Credits Big$11.99

Questions

Is UnderForge free?
UnderForge is free to download, with no in-app purchases.
Is TANK free?
TANK is free to download, with in-app purchases available.
Do UnderForge or TANK have ads?
Neither UnderForge nor TANK shows ads.
Which is updated more often, UnderForge or TANK?
UnderForge ships an update every 9 days, and TANK every 3 days. Most recently, UnderForge was updated on September 28, 2026 and TANK on October 14, 2026.

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