SHREDmill vs Training Zone SSI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SHREDmill
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.
- Simplified speed training
- Smart software integration
- Proven equipment strategies
- Peak athletic potential development
- On and off-field performance enhancement
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SHREDmill is on a mission to simplify speed training and unlock endless opportunities for athletes of all levels. With proven equipment and smart software, we equip athletes with the right speed strategies to go the distance, on or off the field. Speed is the ultimate competitive advantage, and we aim to ensure every athlete reaches their peak potential
Training Zone SSI
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.
- Class reservation
- Event sign-up
- Account management
- Profile updates
- Payment information management
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For members of Training Zone SSI to reserve their place in a class, sign up for gym events, and general account management like updating headshots and credit card on file.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SHREDmill | Training Zone SSI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (14 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 14 — better | 1 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15 |
| Further details — not scored | ||
| Size | 34 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | shredmillspeed | Training Zone Inc |
Customer experience
SHREDmill
Training Zone SSI
In-app purchases
SHREDmill
No in-app purchases
Training Zone SSI
No in-app purchases
Questions
Is SHREDmill free?
Is Training Zone SSI free?
Which has better reviews, SHREDmill or Training Zone SSI?
Do SHREDmill or Training Zone SSI have ads?
Which is updated more often, SHREDmill or Training Zone SSI?
Other comparisons
