J vs Trunk
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
J
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.
- 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
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Enhance your juggling practice! The J-Trainer app will give you tools to ensure that your juggling practice sessions include proper warmup, practice, and cool down. The interval training portion of the J-Trainer tool allows you to build customized workouts to ensure you spend the right amount of practice time on each section of your practice. Most juggling festivals include endurance contests like: club balance endurance, 5 ball endurance, 5 club endurance, and quarter juggling endurance. The Talking Timer feature of the J-trainer gives you verbal feedback on your endurance, so you don't have to look down at your stop watch. ---------------------------- No advertisements and no in app purchases are contained in this app. ---------------------------- Other apps by this developer: Protect TD (Protect Tower Defense - Save the Animals) Math Tower Defense Eagle Mandarin Mandarin Prof Math Town Spelling Ace Spy Town Spanish Prof ---------------------------- I hope you enjoy this app. Feel free to send me feedback if you have suggestions for future updates.
Trunk
This app helps you track your gym workouts and progress with an intuitive interface. It offers AI integration for personalized training plans and detailed analytics, all without any subscriptions.
- Workout logging
- AI training plan integration
- Progress visualization
- Rest timer with notifications
- Offline functionality
- Customizable workout organization
- Unlimited profiles and sessions
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Trunk helps you log your lifting and review your progress. TRACK YOUR LIFTS Record sets, reps and weight. Organize your training with profiles, sessions and exercises. SEE YOUR PROGRESS Review your workout history, compare exercise performance over time, and track progress toward your goals. KEEP YOUR WORKOUT MOVING Set custom rest timers and use Trunk's Lock Screen workout controls. CONNECT YOUR OWN AI Already use an AI assistant like ChatGPT or Claude? Link it with Trunk and import the programs it builds for you in two taps. Anything you share with your AI is between you and your AI provider. AI integration requires Trunk+ (in-app purchase). Questions or feedback? Use the support link on this product page.
Screenshots
Verdict
The clearest difference is in-app purchases: J at none against Trunk's 1. J also leads on ratings volume (4 vs 1) and iOS requirement (12.2 vs 26.2). On price, rating, update cadence and ads 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. Trunk sells 1 one-off in-app purchase. J asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for J against 5.0 for Trunk. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
J ships an update monthly, Trunk every 2 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.
| Parameter | J | Trunk |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.2 — better | 26.2 |
| Further details — not scored | ||
| Size | 19 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Heather Marriott | Adventureland, Inc |
Customer experience
J
Trunk
In-app purchases
J
No in-app purchases
Trunk
- Trunk+$9.99









