# Rumble Boxing Studio Inc. vs Sigma Sets

The clearest difference is review sentiment: Sigma Sets at 100% against Rumble Boxing Studio Inc.'s 0%. Sigma Sets also leads on rating (5.0 vs 1.0) and ads (none vs shown). Rumble Boxing Studio Inc.'s advantage is in-app purchases (none vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sigma Sets sells 1 one-off in-app purchase. Rumble Boxing Studio Inc. asks for nothing beyond the download.

Sigma Sets holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 0% of Rumble Boxing Studio Inc.'s written reviews are positive against 100% of Sigma Sets's.

Rumble Boxing Studio Inc. ships an update every 5 months, Sigma Sets every 10 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Rumble Boxing Studio Inc. | Sigma Sets |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/rumble-boxing-studio-inc/id1299968959/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sigma-sets-workout-tracker/id6766639110/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | Ad-supported | **Free** |
| Size | 155 MB | 107 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rumble Boxing Inc](https://appshunter.io/developer/1526721214) | [WRBO LLC](https://appshunter.io/developer/1853092121) |

## What reviewers say

### Rumble Boxing Studio Inc.

[App page](https://appshunter.io/ios/app/rumble-boxing-studio-inc/id1299968959)

Plan and schedule your fitness classes with ease. Quickly view class schedules, sign up, and get notified about waitlist openings and promotions.

**Highlights:** View class schedules, Sign up for classes, Waitlist notifications, View promotions, Schedule planning

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Sigma Sets

[App page](https://appshunter.io/ios/app/sigma-sets-workout-tracker/id6766639110)

This app helps you track your workouts, compete for personal records, and share routines with friends. It offers smart progression suggestions and insights into your training trends, all for free.

**Highlights:** Rank up system for workouts, Compete for personal record zones, Social features to share workouts, Log sets, reps, and weight, Smart progression recommendations, Automatic PR detection, Built-in rest timer

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SigmaSets Premium | $44.99 | one-time |


## Frequently asked questions

### Is Rumble Boxing Studio Inc. free?

Rumble Boxing Studio Inc. is free to download, with no in-app purchases.

### Is Sigma Sets free?

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

### Which has better reviews, Rumble Boxing Studio Inc. or Sigma Sets?

Sigma Sets is rated higher. Rumble Boxing Studio Inc. averages 1.0 out of 5 from 1 ratings, while Sigma Sets averages 5.0 from 3 ratings.

### Do Rumble Boxing Studio Inc. or Sigma Sets have ads?

Rumble Boxing Studio Inc. shows ads; Sigma Sets does not.

### Which is updated more often, Rumble Boxing Studio Inc. or Sigma Sets?

Rumble Boxing Studio Inc. ships an update every 5 months, and Sigma Sets every 10 days. Most recently, Rumble Boxing Studio Inc. was updated on October 12, 2026 and Sigma Sets on October 1, 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.*