# Pockster StrongArm > iPhone app to measure fine motor control and physiological state. (iPhone/iPad app by Greg Chaffins.) - Source: https://appshunter.io/ios/app/pockster-strongarm/id301044470 (this page in markdown: same URL + `.md`) - Developer: [Greg Chaffins](https://appshunter.io/developer/301044473) - Category: Health & Fitness, Games, Simulation, Sports - Price: Free (on sale, was $2.99) - Rating: 1.40/5 from 5 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 5 MB - Released: 2009-01-12 - Data updated: 2026-08-03 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/pockster-strongarm/id301044470/reviews.md ## What is Pockster StrongArm? Stress affects people on a very basic level. While for most casual activities the changes might not be as noticeable, it still contributes to the overall state of health. And if you are dependent on fine motor control (anybody make trips to the rifle range on a regular basis or play hard core video games?), you may find that simple stress can affect you more than you realize. Our nervous system and fine motor control state can be a good measure of our overall physiological state of being. It should not be surprising that our sense of control can vary each day depending on our health and outside influences. Now, thanks to the mechanical abilities of the iPhone, you can measure your current ability of steady control. The challenge is to simply hold your iPhone in your hand with your arm outstretched and steady. If you can do this easy sounding task for one minute, you pass the test. However, if your arm moves too much, the count starts over. And over. Once you raise your arm and have the phone in position, it will start announcing the count every five seconds. Until then, tones indicate that you do not yet have it level. Why level? Because that is the position that creates the greatest challenge with gravity. Sounds simple enough, but the iPhone senses slight movement that you may not be aware of making. After a few count resets, fatigue becomes a large factor in your success. Of course, there are some people who have a steady hand seemingly all the time, though few in number. If you are curious how you rank, one way to find out is to take the StongArm challenge. For an additional challenge, consider setting up a course to walk while trying to beat the clock. Simple movement adds another level of complexity to the process. You can also check out the state of your friends and colleagues Now, we do not condone the use of StrongArm to help win arguments, nor do we suggest use it to prove a point, but we are sure that you can find creative ways to use this capability. Thank you for looking at Pockster Strongarm! ## Key features - Measure steady hand control - Test against gravity - Track physiological state - Challenge friends and colleagues - Simple, intuitive gameplay ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/pockster-strongarm/id301044470/reviews.md ### 1/5 — It won't install!! *2011-10-21* It says it's installed, but I can't find it!!! ## Frequently asked questions about Pockster StrongArm ### What is Pockster StrongArm? Pockster StrongArm is an application designed to measure your fine motor control and physiological state. It challenges you to hold your iPhone steady with your arm outstretched for one minute. ### How does Pockster StrongArm work? The app uses the iPhone's sensors to detect slight movements. You must hold the device perfectly still, with your arm outstretched, to pass the one-minute test. Tones indicate when the phone is not level, and movement resets the count. ### What is the goal of Pockster StrongArm? The primary goal is to test and measure your ability to maintain a steady hand, which can be an indicator of your overall physiological state and how stress affects you. ### Can I compare my results with others using Pockster StrongArm? Yes, the app allows you to check the state of your friends and colleagues, enabling a competitive element to the steadiness challenge. ### What devices does Pockster StrongArm support? Pockster StrongArm is supported on iPhone devices, as indicated by its compatibility with the iOS ecosystem. ### What is the price of Pockster StrongArm? Pockster StrongArm is a paid application, available for purchase at $2.99. ### Does Pockster StrongArm have ads? No, Pockster StrongArm does not contain advertisements. It is a paid application without any ad interruptions. ### How often is Pockster StrongArm updated? The latest version of Pockster StrongArm is 2.0, and it was last updated on July 11, 2026. This indicates a recent update, suggesting ongoing development and support. ## Version history (last 2 releases) ### 2.0 — 2026-07-11 Updated to the latest Swift code and core mechanics for the best user experience. ### 1.0 — 2009-01-02 No release notes. ## More apps by Greg Chaffins - [White House Escape](https://appshunter.io/ios/app/white-house-escape/id303706486) - [Pockster WordFind](https://appshunter.io/ios/app/pockster-wordfind/id304440791) - [Pockster Crypto](https://appshunter.io/ios/app/pockster-crypto/id305337136) - [Raving Manor](https://appshunter.io/ios/app/raving-manor/id319224773) - [Escape from the Maiden's Curse](https://appshunter.io/ios/app/escape-from-the-maidens-curse/id423455038) All apps by Greg Chaffins: https://appshunter.io/developer/301044473 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-03.*