# Tether - MCAS Tracker — Know your triggers > MCAS tracker for flares, triggers, medications, and doctor reports. (iPhone/iPad app by WILLIAM BARRY AGNEW.) - Source: https://appshunter.io/ios/app/tether-mcas-tracker/id6781950891 (this page in markdown: same URL + `.md`) - Developer: [WILLIAM BARRY AGNEW](https://appshunter.io/developer/6778068361) - Category: Medical - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 17+ - Requires: iOS 26.5 · 3 MB - Languages: American English - Released: 2026-06-23 - Data updated: 2026-07-17 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/tether-mcas-tracker/id6781950891/reviews.md ## What is Tether? Tether - MCAS Tracker is the mast cell activation syndrome (MCAS) tracker built for real life with this condition. Log flares, identify food and environmental triggers, track medications, and generate doctor-ready reports — all in a calm, private app designed for the daily reality of living with MCAS, POTS, EDS, and related chronic illness. Your data stays on your device. No third-party analytics. No ads. No accounts. WHAT YOU CAN DO FOR FREE • Log flares with severity, body systems affected, and notes • Track foods, environmental triggers, and medications • Daily check-in and 30-day flare calendar • Search and filter your full history • Saved lists for medications, known triggers, and safe foods • Daily reminders • Emergency contact info • Export all your data as JSON anytime TETHER PREMIUM — separate in-app subscription required Premium unlocks deeper insights: • AI trigger correlation — surface what's most likely setting off your flares • Pattern dashboard with frequency, time-of-day, and severity charts • Doctor-ready PDF report you can share at appointments • Food label scanner for spotting risky ingredients before you eat • Weather and pollen tracking with daily environmental snapshots • Comorbidity panel for POTS, EDS, Long COVID, and Fibromyalgia • Apple Health sync for heart rate, HRV, sleep, and steps All Premium features are clearly marked in the app and require a separate in-app subscription. You can use Tether's core logging features without subscribing. SUBSCRIPTION PRICING • Tether Premium Monthly — $5.99 per month • Tether Premium Annual — $39.99 per year (save 44%) • New subscribers get a 7-day free trial on the monthly plan Payment is charged to your Apple ID at confirmation of purchase. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period (or before the free trial ends). Manage or cancel anytime in your App Store account settings. BUILT FOR YOUR REALITY Tether - MCAS Tracker is designed for people who live with chronic illness. The interface is calm, low-stimulus, and built to be usable on bad-pain or low-energy days. No streaks, no gamification, no judgment — just a tool that respects your time and energy. PRIVACY-FIRST Everything you log stays on your device. We don't run servers. We don't share your data with anyone. Apple Health data is read on-device only. Your location is only used to fetch local weather data and is never stored. Privacy Policy: https://bagnew21.github.io/Tether/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ DISCLAIMER Tether - MCAS Tracker is a personal health tracking tool. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical concerns. ## Key features - Log MCAS flares with details - Identify food and environmental triggers - Track medications and saved lists - Generate doctor-ready reports - AI trigger correlation (Premium) - Apple Health sync (Premium) ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Tether Premium Monthly | $5.99 | per month | | Tether Premium Annual | $39.99 | per year | ## Frequently asked questions about Tether ### What is Tether - MCAS Tracker? Tether - MCAS Tracker is a personal health tracking tool designed for individuals managing Mast Cell Activation Syndrome (MCAS) and related chronic conditions. It allows users to log flares, identify triggers, track medications, and generate reports for their healthcare providers. ### Is Tether - MCAS Tracker free to use? The core logging features of Tether - MCAS Tracker are available for free. This includes logging flares, tracking foods, environmental triggers, and medications. A separate in-app subscription is required for premium features. ### What are the premium features of Tether - MCAS Tracker? Premium features include AI trigger correlation to identify likely flare causes, a pattern dashboard with charts, doctor-ready PDF reports, a food label scanner, weather and pollen tracking, a comorbidity panel for related conditions, and Apple Health sync. ### How much does Tether Premium cost? Tether Premium is available as a monthly subscription for $5.99 or an annual subscription for $39.99, offering a 44% saving. New subscribers receive a 7-day free trial on the monthly plan. ### Can I cancel my Tether Premium subscription? Yes, subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime through your App Store account settings. ### Does Tether - MCAS Tracker have ads? No, Tether - MCAS Tracker is ad-free. The app emphasizes a calm, private experience without advertisements, ensuring user data is not shared with third parties. ### What devices is Tether - MCAS Tracker available on? Tether - MCAS Tracker is available on iPhone and iPad devices. It is designed with a calm, low-stimulus interface suitable for users experiencing low energy or pain. ### How often is Tether - MCAS Tracker updated? The latest version of Tether - MCAS Tracker is 1.0, and it was last updated on June 24, 2026. Specific update frequency is not detailed, but it is actively maintained. ## Version history (last 1 release) ### 1.0 — 2026-06-24 No release notes. ## More apps by WILLIAM BARRY AGNEW - [Hypermobile: EDS Joint Tracker](https://appshunter.io/ios/app/hypermobile-eds-joint-tracker/id6783487872) - [No Bet - Quit Sports Betting](https://appshunter.io/ios/app/no-bet-quit-sports-betting/id6784740590) - [SGCC Church App](https://appshunter.io/ios/app/sgcc-church-app/id6787487026) All apps by WILLIAM BARRY AGNEW: https://appshunter.io/developer/6778068361 --- *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 2026-07-17.*