# SMART IRON Gym Workout Routine vs FatKillers

The clearest difference is review sentiment: SMART IRON Gym Workout Routine at 100% against FatKillers's 50%. FatKillers's advantage is update cadence (daily vs monthly) and iOS requirement (13.4 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. SMART IRON Gym Workout Routine sells 2 in-app purchases, starting at $7.99 per month and FatKillers sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

SMART IRON Gym Workout Routine ships an update monthly, FatKillers daily. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | SMART IRON Gym Workout Routine | FatKillers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (22 ratings)](https://appshunter.io/ios/app/smart-iron-gym-workout-routine/id1482629705/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 71 MB | 26 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Linar Islamov](https://appshunter.io/developer/1022238262) | [MAKSIM VOLOSHINSKII](https://appshunter.io/developer/1492639578) |

## What reviewers say

### SMART IRON Gym Workout Routine

[App page](https://appshunter.io/ios/app/smart-iron-gym-workout-routine/id1482629705)

This app provides structured, science-based gym workout programs designed for muscle growth and strength. It offers progressive overload and periodization to ensure continuous progress and prevent stagnation, making it ideal for both beginners and experienced athletes.

**Highlights:** Ready-made workout programs, Progressive overload guidance, Training periodization, Adaptable to fitness level, Detailed exercise plans, Progress tracking

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SMART IRON Gym - Full access | $7.99 | per month |
| One Month Access | $4.99 | one-time |


### FatKillers

[App page](https://appshunter.io/ios/app/fatkillers-calorie-tracker/id6476326429)

Estimate calorie intake by simply taking a photo of your meal. This AI-powered app helps you track your food consumption for weight loss goals. It offers detailed insights to support your journey.

**Highlights:** AI-powered calorie estimation, Estimate calories from dish photos, Weight loss tracking, Food consumption monitoring, Detailed insights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $8.99 | per month |
| Annual subscription | $34.99 | per year |


## Frequently asked questions

### Is SMART IRON Gym Workout Routine free?

SMART IRON Gym Workout Routine is free to download, with in-app purchases available.

### Is FatKillers free?

FatKillers is free to download, with in-app purchases available.

### Do SMART IRON Gym Workout Routine or FatKillers have ads?

Neither SMART IRON Gym Workout Routine nor FatKillers shows ads.

### Which is updated more often, SMART IRON Gym Workout Routine or FatKillers?

SMART IRON Gym Workout Routine ships an update monthly, and FatKillers daily. Most recently, SMART IRON Gym Workout Routine was updated on November 3, 2026 and FatKillers on November 4, 2026.

---

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