# iRoll BJJ vs Strike Timer Interval Training

The clearest difference is iOS requirement: Strike Timer Interval Training at 15.1 against iRoll BJJ's 18.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. iRoll BJJ sells 2 in-app purchases, starting at $5.99 per month and Strike Timer Interval Training sells 1 in-app purchase, starting at $14.99 per year. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iRoll BJJ | Strike Timer Interval Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 13 MB | 47 MB |
| Requires iOS | 18.1 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [iRoll Ltd](https://appshunter.io/developer/1872807713) | [Shannon Kempenich](https://appshunter.io/developer/579568236) |

## What reviewers say

### iRoll BJJ

[App page](https://appshunter.io/ios/app/iroll-bjj/id6758413105)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iRoll BJJ Monthly | $5.99 | per month |
| iRoll BJJ Annual | $49.99 | per year |


### Strike Timer Interval Training

[App page](https://appshunter.io/ios/app/strike-timer-interval-training/id6761288575)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strike Timer Pro | $14.99 | per year |


## Frequently asked questions

### Is iRoll BJJ free?

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

### Is Strike Timer Interval Training free?

Strike Timer Interval Training is free to download, with in-app purchases available.

### Do iRoll BJJ or Strike Timer Interval Training have ads?

Neither iRoll BJJ nor Strike Timer Interval Training shows ads.

### Which is updated more often, iRoll BJJ or Strike Timer Interval Training?

iRoll BJJ ships an update every 3 weeks, and Strike Timer Interval Training every 3 weeks. Most recently, iRoll BJJ was updated on October 25, 2026 and Strike Timer Interval Training on October 24, 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.*