grsly vs Juggling Lab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
grsly
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Learn Japanese dynamically with spaced-repetition. Includes 3200 concepts (so far) including: verb/adjective conjugation patterns, counters, dates and times, vocab up through JLPT n4 and beyond, and hiragana / katakana (skippable). Grsly uses Apple’s Standard End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Juggling Lab
Learn and invent juggling patterns with realistic animations and step-by-step instructions. Explore a vast library of patterns, customize animations, and share your creations.
- Animate solo and passing siteswap patterns
- Realistic hand and ball animation
- Integrated siteswap pattern generator
- Step-by-step pattern instructions
- Large categorized pattern library
- Share patterns with friends
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Juggling Lab is an application for creating and animating juggling patterns. Its main goals are to help people learn juggling patterns, and to assist in inventing new ones. Quick feature overview: - Animate all solo and passing siteswap patterns, including synchronous and multiplexed patterns, and patterns involving movement of the juggler bodies - Support for bounced throws - Realistic hand model, with cubic spline hand paths that match the velocities of balls at throwing points - Integrated siteswap pattern generator - Step-by-step instructions to learn popular patterns - Huge (400+) categorized list of juggling patterns - Bookmark your favorite patterns - Pinch to zoom, rotate, pause and change the speed of the animation - Add, delete and rename pattern lists and patterns - Share patterns and pattern lists with your friends - Interoperates with the Juggling Lab desktop application
Screenshots
Verdict
The clearest difference is in-app purchases: Juggling Lab at none against grsly's 1. Juggling Lab also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 6 weeks). grsly's advantage is iOS requirement (14.0 vs 17.6). On price 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. grsly sells 1 in-app purchase, starting at $4.99 per month. Juggling Lab asks for nothing beyond the download.
grsly ships an update every 6 weeks, Juggling Lab every 3 weeks. The most recent releases landed on October 8, 2026 and October 17, 2026 respectively.
| Parameter | grsly | Juggling Lab |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 17 MB | 48 MB |
| Age rating | 12+ | 4+ |
| Developer | Satchel Spencer | JACK BOYCE |
In-app purchases
grsly
- grsly pro$4.991 Month
Juggling Lab
No in-app purchases
