Comparison

Erie BJJ Seminar vs Judokai

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Erie BJJ Seminar

Features
Read full description

Belt Level: Mid-level white to low-level purple belt Emphasis: Grips, Off-balancing, Sweeps, Set-ups, Training methods The focus of this two-day, seven hour, seminar was on sweeps and collar chokes when an opponent is inside of your guard. From the beginning of the instructional, the focus is placed on the use of proper grips, positioning of the arms and body, and the mechanics of the sweeps and collar choke. As the instructional progresses, Mr. Harris teaches you the proper mindset as well as some unique training methods to help the students develop and mature their sweeps and collar chokes over time.

About

Judokai

Master Kodokan Judo techniques with detailed, slow-motion video demonstrations. Access all techniques anytime, anywhere, and download them for offline viewing. Learn from a 6th Dan Judo champion.

Highlights
  • Detailed Kodokan Judo techniques
  • 240 FPS slow-motion video
  • Offline video downloads
  • Learn from a 6th Dan champion
  • All Judo techniques accessible
Features
Read full description

JUDOKAI — Your Kodokan Judo Reference Study the traditional techniques of Kodokan Judo through detailed, high-quality demonstrations. Explore Kata performed by respected Judo practitioners, study techniques from multiple angles, and keep your entire Judo reference library available wherever you train. EVERY KODOKAN TECHNIQUE Every traditional Kodokan Judo technique is demonstrated by César Nicola, 6th Dan, World Veterans Champion and National Judo Shiai & Kata Champion. Study the complete execution of each technique and replay it whenever you want to examine the movement, positioning and technical details. SEE THE TECHNIQUE FROM MULTIPLE ANGLES Carefully selected camera angles give you different perspectives of each technique, helping you observe the complete movement and focus on the details that matter. EXPLORE JUDO KATA Study dedicated Kata modules performed by respected Judo practitioners. Explore each Kata technique in detail and return to the demonstrations whenever you want to review and refine your understanding. STUDY OFFLINE Every Judo technique and Kata video can be saved for offline playback. Study at the dojo, at home, while traveling, or anywhere without an internet connection. BUILD YOUR PERSONAL REFERENCE • Bookmark techniques for quick access • Save techniques for offline playback • Revisit your favorite techniques whenever you need • Keep your Judo reference with you wherever you train FOR JUDOKAS WHO WANT TO STUDY THE DETAILS Whether you're learning a technique, reviewing what you practiced at the dojo, studying for a grading, working on Kata, or simply looking for a reliable technical reference, JUDOKAI puts traditional Kodokan Judo at your fingertips. JUDOKAI isn't a replacement for the dojo. It's the technical reference you can use alongside your training to watch, review and study Judo techniques in greater detail. Study the technique. Review the details. Strive for perfection.

Screenshots

Erie BJJ Seminar4 screens
Judokai4 screens

Verdict

The call

The clearest difference is price: Judokai at Free against Erie BJJ Seminar's $9.99. Judokai also leads on update cadence (every 3 weeks vs every 25 months). Erie BJJ Seminar's advantage is in-app purchases (none vs 10) and iOS requirement (11.0 vs 15.0). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Judokai is free to download; Erie BJJ Seminar costs $9.99 up front. Judokai sells 10 one-off in-app purchases. Erie BJJ Seminar asks for nothing beyond the download.

UpkeepUpdate frequency

Erie BJJ Seminar ships an update every 25 months, Judokai every 3 weeks. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 6 level
Erie BJJ Seminar versus Judokai: the parameters behind the verdict, then further details
ParameterErie BJJ SeminarJudokai
Price$9.99Free — better
Rating4.7 (191 ratings) — better
Positive reviews74.4% of reviews
Number of ratings191 — better
Update frequencyEvery 25 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size26 MB45 MB
Age rating4+4+
DeveloperHarris InternationalEduardo Costa Producoes Audiovisuais LDA

In-app purchases

None

Erie BJJ Seminar

No in-app purchases

10 purchases

Judokai

One-time10
  • Ma-sutemi-waza$1.99
  • Koshi-waza$2.99
  • Osaekomi-waza$2.99
Show 7 more
  • Kansetsu-waza$2.99
  • Shime-waza$3.99
  • Yoko-sutemi-waza$4.99
  • Te-waza$4.99
  • Kodokan Goshin Jutsu$4.99
  • Ashi-waza$6.99
  • Judokai$14.99

Questions

Is Erie BJJ Seminar free?
Erie BJJ Seminar costs $9.99, with no in-app purchases.
Is Judokai free?
Judokai is free to download, with in-app purchases available.
Do Erie BJJ Seminar or Judokai have ads?
Neither Erie BJJ Seminar nor Judokai shows ads.
Which is updated more often, Erie BJJ Seminar or Judokai?
Erie BJJ Seminar ships an update every 25 months, and Judokai every 3 weeks. Most recently, Erie BJJ Seminar was updated on September 16, 2026 and Judokai on September 21, 2026.

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