# SHREDmill vs Training Zone SSI

The clearest difference is ads: SHREDmill at none against Training Zone SSI's shown. SHREDmill also leads on ratings volume (14 vs 1) and monetization model (free vs ad-supported). Training Zone SSI's advantage is rating (5.0 vs 4.8). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Training Zone SSI holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: SHREDmill has 14 ratings behind it against 1, so its average is the more settled of the two.

SHREDmill ships an update monthly, Training Zone SSI every 3 weeks. The most recent releases landed on September 25, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SHREDmill | Training Zone SSI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (14 ratings)](https://appshunter.io/ios/app/shredmill/id1639359181/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/training-zone-ssi/id6751212640/reviews)** |
| Number of ratings | **14** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 34 MB | 94 MB |
| Requires iOS | **13.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [shredmillspeed](https://appshunter.io/developer/1639359183) | [Training Zone Inc](https://appshunter.io/developer/1600481504) |

## What reviewers say

### SHREDmill

[App page](https://appshunter.io/ios/app/shredmill/id1639359181)

This app simplifies speed training for athletes of all levels using proven equipment and smart software. It provides athletes with effective speed strategies to enhance their performance on and off the field, helping them reach their peak potential.

**Highlights:** Simplified speed training, Smart software integration, Proven equipment strategies, Peak athletic potential development, On and off-field performance enhancement

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

**In-app purchases:** none


### Training Zone SSI

[App page](https://appshunter.io/ios/app/training-zone-ssi/id6751212640)

Manage your gym membership, book classes, and sign up for events. Update your profile information and payment details easily. Stay connected with your fitness community.

**Highlights:** Class reservation, Event sign-up, Account management, Profile updates, Payment information management

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is SHREDmill free?

SHREDmill is free to download, with no in-app purchases.

### Is Training Zone SSI free?

Training Zone SSI is free to download, with no in-app purchases.

### Which has better reviews, SHREDmill or Training Zone SSI?

Training Zone SSI is rated higher. SHREDmill averages 4.8 out of 5 from 14 ratings, while Training Zone SSI averages 5.0 from 1 ratings.

### Do SHREDmill or Training Zone SSI have ads?

Training Zone SSI shows ads; SHREDmill does not.

### Which is updated more often, SHREDmill or Training Zone SSI?

SHREDmill ships an update monthly, and Training Zone SSI every 3 weeks. Most recently, SHREDmill was updated on September 25, 2026 and Training Zone SSI 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.*