Comparison

Mass Building Program vs Workout for Underweight

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

Head to head
About

Mass Building Program

This workout application focuses on maximizing muscle mass gain over a 4-week period. It utilizes heavy compound exercises to intensely train each muscle group multiple times weekly. The program aims to build strength, improve physique, and boost confidence.

Highlights
  • 4-week mass gain plan
  • Heavy compound exercises
  • Intense muscle group training
  • Focus on strength and physique
  • Promotes confidence and discipline
Features
Read full description

This workout app is designed to increase your muscle mass as much as possible in 4 weeks. The program works each muscle group hard few times per week using mostly heavy compound exercises. If done right, this will be one of the toughest program you’ve taken on in a long time. If you can handle it, though, not only will you be stronger and look bigger in 4 weeks, you’ll be primed to continue packing on mass while staying lean at the same time. Building an impressive physique not only grants external benefits such as strength, power, and an aesthetically pleasing structure. It also provides many internal benefits: confidence, increased self-esteem, and self-discipline, just to name a few.

About

Workout for Underweight

Features
Read full description

Gaining weight is a process that requires the right combination of proper nutrition, consistent physical training, and regular health tracking. This app is specifically designed for underweight individuals, those with poor nutrient absorption, or anyone recovering after a period of physical decline. Developed with in-depth guidance from nutritionists and fitness trainers, the app provides step-by-step support on your journey to sustainably regain your health and improve your physique. Key Features: - Track weight and body metrics: Update your weight daily and monitor key health indicators such as BMI, BMR, and TDEE to understand your current condition and set clear, achievable goals. - Personalized weight gain meal plans: Choose meal portions based on daily calorie needs (2500–3000–3500 kcal). Options are tailored to different user types, including vegetarians, fitness enthusiasts, those recovering from illness, or people with sensitive digestion. - Weight gain training programs: Access guided workouts for building muscle at home or in the gym, complete with structured schedules, instructional videos, and customizable plans targeting full body, arms, shoulders, back, or glutes. - Workout schedule and meal reminders: The app automatically reminds you to eat on time, avoid skipping meals, and stay consistent with your exercise routine according to your personalized plan. - Smoothie and snack recipes: Get suggestions for light, easy-to-digest snacks and high-calorie smoothies that boost intake without causing bloating. - Daily health insights: Access expert-written articles covering effective weight gain tips, digestion improvement, hormonal balance, and healthy lifestyle motivation. - Progress reports: View weekly and monthly summaries of your body metrics and activity data through charts and visual analytics to track visible improvements over time. This weight gain app is the ideal choice for anyone seeking to gain weight at home naturally, especially those who are underweight and want to improve their physique and overall health through a balanced diet and structured fitness program. It’s not only suitable for men looking to build lean muscle or women aiming for a more toned body but also perfect for individuals working out at home without access to a gym. With healthy meal plans, detailed eating schedules, and tailored workout programs for people with difficulty gaining weight, you'll have a clear and scientifically backed roadmap to follow. Additionally, tools for calorie tracking, 3000 kcal/day meal guidance, belly-fat-free weight gain tips, and sustainable muscle-building routines will help you reach your goals safely and effectively. This is truly the most comprehensive weight gain app for skinny individuals you shouldn’t miss. Need a complete solution to eat smart, train right, and gain weight effectively? Download the app today and start transforming your body the smart and sustainable way. This app is not intended to provide medical advice. All content is for informational and reference purposes only. Please consult your doctor or a qualified healthcare provider before making any medical decisions or applying any recommendations from this app Update: - Optimize UI for Workout and exercises - Add more workout and exercises - Support more languages

Screenshots

Mass Building Program4 screens
Workout for Underweight4 screens

Verdict

The call

The clearest difference is in-app purchases: Workout for Underweight at none against Mass Building Program's 9. Workout for Underweight also leads on ads (none vs shown) and update cadence (monthly vs every 46 months). Mass Building Program's advantage is iOS requirement (11.0 vs 16.0). On price and device support 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. Mass Building Program sells 9 one-off in-app purchases. Workout for Underweight asks for nothing beyond the download.

UpkeepUpdate frequency

Mass Building Program ships an update every 46 months, Workout for Underweight monthly. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

Scorecard4 real differences · 6 level
Mass Building Program versus Workout for Underweight: the parameters behind the verdict, then further details
ParameterMass Building ProgramWorkout for Underweight
PriceFreeFree
Rating3.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 46 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad
Requires iOS11.0 — better16.0
Further details — not scored
Size156 MB66 MB
Age rating17+4+
DeveloperFitricNgoc Thanh Pham

In-app purchases

9 purchases

Mass Building Program

One-time9
  • Removal of advertisements$0.99
  • Dumbbell Workout Plan$1.99
  • Exercises for Beginners$1.99
Show 6 more
  • Butt, Thighs and Legs$1.99
  • Six Pack Abs$1.99
  • Upper Body Workout$1.99
  • Build Bigger Arms$1.99
  • Building Muscle and Strength$1.99
  • Full Program Bundle$4.99
None

Workout for Underweight

No in-app purchases

Questions

Is Mass Building Program free?
Mass Building Program is free to download, with in-app purchases available.
Is Workout for Underweight free?
Workout for Underweight is free to download, with no in-app purchases.
Do Mass Building Program or Workout for Underweight have ads?
Mass Building Program shows ads; Workout for Underweight does not.
Which is updated more often, Mass Building Program or Workout for Underweight?
Mass Building Program ships an update every 46 months, and Workout for Underweight monthly. Most recently, Mass Building Program was updated on September 23, 2026 and Workout for Underweight on September 13, 2026.

Other comparisons