# J vs Longevity Copilot

The clearest difference is device support: J at 3 against Longevity Copilot's 1. J also leads on iOS requirement (12.2 vs 16.6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | J | Longevity Copilot |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/j-trainer/id1469085063/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | — |
| Size | 19 MB | 49 MB |
| Requires iOS | **12.2** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Heather Marriott](https://appshunter.io/developer/919616194) | [Guenther Hintringer](https://appshunter.io/developer/1720701000) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-trainer/id1469085063)

This app provides tools to structure your juggling practice sessions, including warm-up, practice, and cool-down routines. It features interval training for customized workouts and a talking timer for endurance practice, offering verbal feedback without needing to check your stopwatch.

**Highlights:** Structured practice routines (warm-up, practice, cool-down), Customizable interval training workouts, Talking timer for endurance practice, Verbal feedback for endurance contests, Ad-free experience

**Features:** macOS Compatibility

**In-app purchases:** none


### Longevity Copilot

[App page](https://appshunter.io/ios/app/longevity-copilot/id6474119496)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is Longevity Copilot free?

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

### Do J or Longevity Copilot have ads?

Neither J nor Longevity Copilot shows ads.

### Which is updated more often, J or Longevity Copilot?

J ships an update monthly, and Longevity Copilot monthly. Most recently, J was updated on October 10, 2026 and Longevity Copilot on October 5, 2026.

---

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