# Masseter: Jaw Clench & TMJ — Teeth Grinding & Jaw Pain > Science-backed awareness tool for jaw clenching, teeth grinding, and TMJ tension. (iPhone/iPad app by Mateusz Zajac.) - Source: https://appshunter.io/ios/app/masseter-jaw-clench-and-tmj/id6758920098 (this page in markdown: same URL + `.md`) - Developer: [Mateusz Zajac](https://appshunter.io/developer/1603708297) - Category: Health & Fitness, Medical - Price: Free with in-app purchases (on sale, was $3.99) - Rating: 3.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 26.0 · 58 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Polish, Russian, Chinese (Simplified, China), European Spanish, Ukrainian - Released: 2026-02-21 - Data updated: 2026-08-20 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/masseter-jaw-clench-and-tmj/id6758920098/reviews.md ## What is Masseter? Your jaw works harder than you think — and Masseter helps you notice. Bruxism affects up to 31% of adults. Jaw clenching, teeth grinding, and TMJ tension often go unnoticed until the damage is done: headaches, worn enamel, chronic pain, disrupted sleep. Masseter is a science-backed awareness tool that uses Ecological Momentary Assessment (EMA) — the gold standard in behavioral research — to help you catch clenching in real time, build mindful habits, and reduce jaw tension over time. --- HOW IT WORKS - SMART REMINDERS — Random check-ins throughout your active hours. No predictable patterns. Based on the same stratified-random sampling used in clinical studies. - ONE-TAP CHECK-IN — When prompted, simply log whether you're Relaxed, In Contact, Clenching, or Bracing. Takes 2 seconds. - TENSION INDEX — See your daily jaw tension score on a beautiful radial gauge. Track progress over days and weeks. - CONTEXT TAGS — Tag what you're doing when you clench (work, commute, sleep). Discover your personal triggers. --- INSIGHTS THAT MATTER - Hourly tension heatmaps — see when you clench most - Day-of-week analysis — discover your worst days - Context correlations — find which activities drive tension - 30-day trend charts — watch your progress unfold - Peak tension alerts — identify your danger zones --- LEARN & UNDERSTAND 4 in-depth articles written in plain language: - The Masseter Muscle — physiology of jaw tension - The Spot Technique — awareness building method - Relief Protocol — acute pain management - Sleep Hygiene — nighttime bruxism strategies --- DESIGNED FOR YOUR LIFE - Apple Watch — check in from your wrist - Home Screen Widget — one-tap logging without opening the app - Quick Actions — fast shortcuts for instant check-ins - Lock Screen Notifications — respond directly from the notification - iCloud Sync — seamless data across all your devices - Baseline Pain Assessment — track jaw, temple, and neck pain over time --- PRIVACY FIRST Your jaw data stays on YOUR device. No accounts required. No data sold. Optional iCloud sync is encrypted end to end. See our privacy policy for details. --- WHO IS MASSETER FOR? - People diagnosed with bruxism or TMJ disorder - Anyone who catches themselves clenching during stress - Night guard users who want daytime awareness - Dental patients tracking jaw habits between appointments - Anyone experiencing jaw pain, headaches, or facial tension --- Masseter doesn't replace your dentist — it gives you the data to have a better conversation with them. Download Masseter and start building jaw awareness today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Smart, random check-ins - One-tap logging - Jaw tension index and heatmaps - Contextual trigger identification - Progress trend charts - In-depth educational articles - Apple Watch and widget support ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly | $1.99 | per month | | Yearly | $9.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime | $29.99 | one-time | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/masseter-jaw-clench-and-tmj/id6758920098/reviews.md ### 3/5 — Crashes *2026-08-10* It worked well for a few days and then started to crash where I had to completely delete the app and lost any logged data. Maybe it won’t do that to you but this was my experience. I would try it again if this was fixed. ## Frequently asked questions about Masseter ### What is Masseter? Masseter is a health and fitness app designed to help users become aware of and reduce jaw clenching, teeth grinding, and TMJ tension. It uses a science-backed method called Ecological Momentary Assessment (EMA) to provide real-time feedback and track progress. ### How does Masseter help with jaw pain? Masseter helps by prompting users to log their jaw tension throughout the day, identifying personal triggers and patterns. This increased awareness, combined with educational articles on relief protocols, can lead to reduced jaw tension and pain over time. ### Is Masseter free to use? Masseter is free to download and offers core features for tracking jaw clenching. It also provides optional subscription plans for advanced features and insights, with monthly and yearly options available. ### What devices does Masseter support? Masseter is designed for Apple devices, including the iPhone and iPad. It also offers integration with the Apple Watch for convenient check-ins and a Home Screen Widget for quick logging. ### Does Masseter have ads? No, Masseter does not contain advertisements. The app is focused on providing a seamless and distraction-free experience for users tracking their jaw health. ### How often is Masseter updated? The latest version of Masseter, 1.6.3, was released on August 19, 2026, indicating regular updates. Users can expect ongoing improvements and new features based on the app's development cycle. ### What are the subscription options for Masseter? Masseter offers two subscription plans: a monthly subscription for $1.99 and a yearly subscription for $9.99. These plans unlock additional insights and features beyond the free core functionality. ### How does Masseter protect user privacy? Masseter prioritizes user privacy by keeping jaw data on the user's device and not requiring accounts or selling data. Optional iCloud sync is end-to-end encrypted, ensuring your sensitive health information remains secure. ## Version history (last 5 releases) ### 1.6.3 — 2026-08-19 • Bug fixes and small improvements throughout the app. ### 1.6.2 — 2026-07-30 • Apple Watch reminders are easier to answer: duplicate Relaxed/Tense wording has been removed, and compact response buttons now carry the status icons. • Active check-in streaks stay accurate before your first check-in of the day, and rating prompts wait until they can be shown. • Additional bug fixes and polish throughout the app. ### 1.6.1 — 2026-07-22 This update improves reminder reliability. • Masseter now refreshes scheduled check-ins automatically when notifications are enabled. • Added a Refresh reminders action in Settings. • Added a test reminder so you can confirm notifications are reaching your device. • Includes stability improvements for notification scheduling. ### 1.6.0 — 2026-07-20 This update makes reminder frequency easier to tailor and clarifies what is included with Masseter Pro. • Choose Gentle (4), Balanced (6), or Intensive (10 check-ins per day). • Masseter Pro includes Personalized Coach, advanced insights, dentist-ready reports, and the full exercise library. • Improved Pro access handling, navigation, and overall stability. ### 1.5.5 — 2026-07-17 Check-ins now provide clearer confirmation across iPhone and Apple Watch. • New visual confirmation after logging from a notification or in the app. • Clearer results from Siri and Shortcuts on both platforms. • Improved accessibility and reliability throughout the check-in flow. ## Apps similar to Masseter | App | Rating | Price | Category | | --- | --- | --- | --- | | [CalmJaw: TMJ Pain Relief](https://appshunter.io/ios/app/calmjaw-tmj-pain-relief/id6739505421) | 4.7 (6) | Free | Health & Fitness | | [myTMJ Tracker](https://appshunter.io/ios/app/mytmj-tracker/id6757337157) | 5.0 (2) | Free | Health & Fitness | | [TMJ Relief](https://appshunter.io/ios/app/tmj-relief/id6759633535) | — | Free | Health & Fitness | | [Bruxcontrol](https://appshunter.io/ios/app/bruxcontrol/id6758412940) | — | Free | Health & Fitness | | [unclench - drop the tension](https://appshunter.io/ios/app/unclench-drop-the-tension/id6763179224) | — | Free | Health & Fitness | | [Bruxism: Exercises & Routines](https://appshunter.io/ios/app/bruxism-exercises-and-routines/id6758614272) | 5.0 (1) | Free | Health & Fitness | ## More apps by Mateusz Zajac - [Prayerbook for Catholics](https://appshunter.io/ios/app/prayerbook-for-catholics/id1603708175) - [Genius IQ: Brain Games](https://appshunter.io/ios/app/genius-iq-brain-games/id6747674510) - [Global Tap 26 Soccer](https://appshunter.io/ios/app/global-tap-26-soccer/id6760048131) - [Speak New York](https://appshunter.io/ios/app/speak-new-york/id6761996188) - [AirPong Motion](https://appshunter.io/ios/app/airpong-motion/id6777819757) All apps by Mateusz Zajac: https://appshunter.io/developer/1603708297 ## Related topics [tongue chi tmj relief](https://appshunter.io/ios/topics/tongue-chi-tmj-relief) · [tmj](https://appshunter.io/ios/topics/tmj) --- *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 2026-08-20.*