# Mass Building Program vs Workout for Underweight

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.

Both are free to download. Mass Building Program sells 9 one-off in-app purchases. Workout for Underweight asks for nothing beyond the download.

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.

## The numbers

| Metric | Mass Building Program | Workout for Underweight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/mass-building-program/id1550724390/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 46 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 156 MB | 66 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Fitric](https://appshunter.io/developer/1545172045) | [Ngoc Thanh Pham](https://appshunter.io/developer/907794619) |

## What reviewers say

### Mass Building Program

[App page](https://appshunter.io/ios/app/mass-building-program/id1550724390)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Removal of advertisements | $0.99 | one-time |
| Dumbbell Workout Plan | $1.99 | one-time |
| Exercises for Beginners | $1.99 | one-time |
| Butt, Thighs and Legs | $1.99 | one-time |
| Six Pack Abs | $1.99 | one-time |
| Upper Body Workout | $1.99 | one-time |
| Build Bigger Arms | $1.99 | one-time |
| Building Muscle and Strength | $1.99 | one-time |
| Full Program Bundle | $4.99 | one-time |


### Workout for Underweight

[App page](https://appshunter.io/ios/app/workout-for-underweight/id6746104775)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*