Substrata: Headache Tracker
Find environmental triggers
About
This app analyzes environmental factors like weather and noise alongside your personal health data, such as sleep and heart rate, to identify potential triggers for headaches and other symptoms. It uses on-device intelligence to provide plain-English explanations and predictive alerts, helping you understand what affects your well-being.
What's New in Substrata
1.8.0
October 7, 2026
Substrata 1.8 is designed for iPhone Duo and for large text sizes. - Designed for iPhone Duo's inner display: the Dashboard, Log, Charts, Insights and Settings spread into side-by-side columns instead of one stretched list. - Open a pattern in Insights on the inner display and its chart sits right beside the list, with both readings plotted over the same days. - Log something on the inner display and a "Moves with this" panel shows what has tracked with it in your own data. Cycle and intimacy entries stay behind Face ID there too. - On the cover display, Quick Log labels wrap instead of being cut off, and close buttons stay visible when a sheet is scrolled. - A note you're typing stays in view when you fold or unfold. - At the largest text sizes, the Dashboard, Log and Charts rearrange so nothing is cut off, and row icons grow with your text. - Fixes for iOS 27, including sheets that could open with outdated content and the weekly summary opening twice.
MoreSubscriptions & In-App Purchases
Substrata Premium Monthly
All Premium, monthly. 7-day free trial.
Developer apps
FAQ
What is Substrata's Sleep Condition Score?
Substrata's Sleep Condition Score evaluates how well your bedroom environment supported your sleep. It considers factors like noise levels, temperature, humidity, and barometric pressure stability, providing insights into your sleep quality.
How does Substrata identify headache triggers?
After logging 20-30 headache events, Substrata's on-device engine builds a personal trigger profile. It correlates your logged symptoms with environmental data like barometric pressure drops and bedroom noise, then offers predictive alerts.
Does Substrata use my microphone to collect noise data?
No, Substrata does not use your microphone in production. Noise data is sourced from your Apple Watch, ensuring your privacy is maintained.
What are the benefits of Substrata Premium?
Substrata Premium unlocks all identified correlations, your personal headache trigger profile with predictive alerts, AI-generated insight narratives, and the ability to export data in PDF and CSV formats for doctor consultations. It also provides history beyond 30 days.
What devices is Substrata compatible with?
Substrata requires an iPhone with iOS 26 or later and an Apple Intelligence-capable device for AI insights. An Apple Watch is strongly recommended for comprehensive data, but the app works without one using weather and sleep duration data.
Is Substrata a medical device?
No, Substrata is not a medical device and does not provide medical advice. It is designed to explore potential connections between environmental and health data for personal review. Always consult a healthcare provider for diagnosis or treatment.
How often is Substrata updated?
The latest version of Substrata is 1.6.2, last updated on May 25, 2026. The app is actively maintained, with updates typically released to improve features and address any issues.
What is the pricing for Substrata Premium?
Substrata offers two premium subscription plans: Monthly at $4.99 and Annual at $29.99. Both plans include a 7-day free trial period.
