Lock In Squad is a free app blocker for iPhone and Android that is designed to help users limit access to distracting applications during focused periods. Users select apps to block, set a focus duration, and start a lock in. Selected apps remain blocked until the user ends the session by holding the Lock Out button for a configured delay ranging from 1 to 30 seconds, and new accounts begin with a hold of 5 seconds. The app is intended for high school and college students and their friend groups, and it supports both individual and group focus sessions. Main features include app selection and blocking, stopwatch or countdown timing, streaks, rewards, and productivity statistics. Users can invite friends through the app or by sharing a link, and friends without the app can install it and join with a free account. Group sessions display live standings showing how long each participant has been locked in, and a weekly leaderboard awards the top position for the following week. On iPhone, users can block categories such as Social, Games, and Entertainment. On Android, users can select apps individually, use an Allow only these apps whitelist mode, or use the Browsers option to block all browsers at once. Android also supports blocking specified websites in browsers including Chrome, Samsung Internet, Firefox, Edge, Brave, Opera, DuckDuckGo, and Vivaldi while a lock in or scheduled block is active. Websites that open inside other apps, such as Instagram or TikTok, cannot be blocked. Typical use involves installing the app from the App Store or Google Play, granting the permissions required for blocking, choosing apps or websites to restrict, setting a focus duration, and starting a session. Users can work with a stopwatch or countdown timer and review their progress through streaks and statistics. Ending a session early requires holding the Lock Out button for the chosen delay, which introduces a deliberate pause before the block is removed. The app is free and requires an iPhone or Android device with the necessary blocking permissions enabled.