Comparison

Joint Locks by Rory Miller vs SimpleTimerOk

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

Head to head
About

Joint Locks by Rory Miller

Learn to improvise joint locks under pressure with this video app. It offers a principles-based approach to mastering physical control techniques, suitable for beginners. Access sample videos for free and unlock comprehensive lessons with a single in-app purchase.

Highlights
  • Principles-based joint lock training
  • Improvisation under pressure
  • Video chapters covering various joint types
  • Lock flow drills
  • Escaping joint locks
  • Suitable for beginners
Features
Read full description

Learn to Improvise Joint Locks Under Pressure with Rory Miller. Same videos as the Joint Locks DVD for much less! Video Chapters: • Intro • Principles • Hinge Joints • Ball and Socket Joints • Gliding Joints • Fingers • Principles Review • Lock Flow Drill • Escaping Locks • Conclusion In this 60-minute video app, Rory Miller makes the case that the problem is not with the locks themselves, but with our teaching methods. A principles-based approach allows relative beginners to improvise joint locks with one hour of training, something that many traditional approaches have failed to do with hundreds of hours. This app is available for free download with sample videos, and offers a single in-app purchase to access these joint lock lessons for the lowest possible cost. Joint locks are widely regarded as one of the most versatile physical tools-- they can move, immobilize, submit or severely injure a threat. They are also justifiably regarded as one of the more difficult of martial arts skills to implement in real life. Joint locks are NOT primary self-defense techniques. If you are in a position that requires self-defense you are justified in and likely need a higher level of force. However, if your job requires controlling violent people with minimal injury you must be good at joint locks and you must be able to improvise them under pressure. Rory Miller is a writer and teacher living peacefully in the Pacific Northwest, USA. He has served for seventeen years in corrections as an officer and sergeant working maximum security, booking and mental health; leading a tactical team; and teaching subjects ranging from Defensive Tactics and Use of Force to First Aid and Crisis Communications with the Mentally Ill. For fourteen months he was an advisor to the Iraqi Corrections System. He received a BS degree in Psychology; served in the National Guard as a Combat Medic (91A/B); earned college varsities in judo and fencing, and received a mokuroku in jujutsu. Mr. Miller is the author of several award-winning books and DVDs, including “Meditations on Violence”, “Facing Violence”, “Scaling Force”, and “Conflict Communications”. As an experienced martial artist and veteran correction officer, Rory Miller distills what he learned from jailhouse brawls, tactical operations, and ambushes to explore the differences between martial arts and the subject martial arts were designed to deal with: Violence. In his work, Miller introduces the myths, metaphors and expectations that most martial artists have about what they will ultimately learn in their dojo. This is then compared with the complexity of the reality of violence. Thank you for downloading our app! We are striving to make the best possible video apps available. Sincerely, The team at YMAA Publication Center, Inc. (Yang’s Martial Arts Association) CONTACT: apps@ymaa.com VISIT: www.YMAA.com WATCH: www.YouTube.com/ymaa

About

SimpleTimerOk

Features
Read full description

SimpleTimerOk is a straightforward and easy-to-use mobile application designed to help individuals with their workout training sessions. With this app, users can set an interval timer according to their specific training needs. SimpleTimerOk provides users with a clear and concise interface that allows them to easily set and adjust their timers. Whether you're doing cardio, weight lifting, or any other type of workout, SimpleTimerOk can help you keep track of your intervals, making it easier to achieve your fitness goals

Screenshots

Joint Locks by Rory Miller2 screens
SimpleTimerOk4 screens

Verdict

The call

The clearest difference is in-app purchases: SimpleTimerOk at none against Joint Locks by Rory Miller's 1. SimpleTimerOk also leads on update cadence (every 3 weeks vs every 38 months) and iOS requirement (12.0 vs 15.1). On price, 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

Both are free to download. Joint Locks by Rory Miller sells 1 one-off in-app purchase. SimpleTimerOk asks for nothing beyond the download.

UpkeepUpdate frequency

Joint Locks by Rory Miller ships an update every 38 months, SimpleTimerOk every 3 weeks. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Joint Locks by Rory Miller versus SimpleTimerOk: the parameters behind the verdict, then further details
ParameterJoint Locks by Rory MillerSimpleTimerOk
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 38 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.112.0 — better
Further details — not scored
Size38 MB30 MB
Age rating4+4+
DeveloperYMAA Publication Center, Inc.Sergei Klishin

In-app purchases

1 purchases

Joint Locks by Rory Miller

One-time1
  • Unlock everything$9.99
None

SimpleTimerOk

No in-app purchases

Questions

Is Joint Locks by Rory Miller free?
Joint Locks by Rory Miller is free to download, with in-app purchases available.
Is SimpleTimerOk free?
SimpleTimerOk is free to download, with no in-app purchases.
Do Joint Locks by Rory Miller or SimpleTimerOk have ads?
Neither Joint Locks by Rory Miller nor SimpleTimerOk shows ads.
Which is updated more often, Joint Locks by Rory Miller or SimpleTimerOk?
Joint Locks by Rory Miller ships an update every 38 months, and SimpleTimerOk every 3 weeks. Most recently, Joint Locks by Rory Miller was updated on October 16, 2026 and SimpleTimerOk on October 6, 2026.

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