FREE session tracker
Sauna + Cold Exposure App
A dead easy daily habit tracker, made for fun by Will Stewart to help you hit peak performance outcomes and live longer.
heat exposure
Why Sauna?
A 20+ year study in Finland has shown that regular use of Traditional Sauna (+ 212°F/80°C) can has a range of longevity benefits including: reducing your chance of death (40%) and cardiovascular disease (50%) along with delaying the onset of Alzheimer’s by approximately 6 years.Getting into a Traditional Sauna regularly is also the closest thing you can do to exercising while still remaining stationary.Sauna/Hot Sessions we track:Traditional Sauna,
Infrared Sauna,
Steam Sauna,
Hot Plunge;
Other.
COLD EXPOSURE
Why Cold?
Studies on cold water immersion are more recent but extremely compelling.Cold Water Immersion has been shown to activate the Vagus nerve. This happens by introducing a stress response to the body where it works to return the core body temperature to normal.Your body does this by activating the parasympathetic nervous system which regulates hormones such as cortisol and dopamine.There is emerging evidence this can have major impacts building your resilience to stress, increasing mood and decreasing anxiety.Cold Sessions we track:Cold Swimming,
Cold Shower,
Cold Plunge;
Other.
try it out
Try on iOS now!
Our app is currently in Beta on iOS.If you want to kick the tires on our app, or be first to know when it's fully live in app stores, drop your details below.
Insights
Find What Works
We built this app because although no matter what the science says - we're all individuals.Whether you're trying to sleep better, be more productive in the day or win an Olympic Medal: find your own best Session Protocols to get the most out of life - however you're living it.Find your own sweet spot.
TRACK YOUR SESSIONS
Go Live or Log Later
Whether you live record with your phone or smartwatch, or simply log it later, keep your hot and cold exposure sessions all in one safe place.To ensure you're hitting your desired health outcomes you can track details like: sauna temperature & humidity, water & air temperature, and time of day.
GOAL SETTING
Hit Your Weekly Goals
As few as 57 minutes in the sauna or 11 minutes of cold exposure per week has science-backed proof it can help you live longer, reduce stress and anxiety and delay your chances of cardiovascular disease or Alzheimer's.But without keeping track of these sessions it's hard to know if you're hitting these types of metrics week-in-week out.Now it's easy, fun and free!
GETTING SMART
Health App & Smartwatches
If you choose, you can integrate our app with your Health Wallet. All sessions can automatically sync with Apple Health and Google Health (coming soon)Regular Apple Watch, Garmin, or Google Smartwatch user? You've come to the right place!All of your Sessions can be tracked using a smartwatch - this will track body metrics like Heart Rate. (available in iOS, first)
try it out
We're in Beta
If you've got an iPhone (and even an Apple Watch) and want to join our epic crew of beta testers send us your details now and we'll contact you by email with how to start logging your Sessions today.
© Sessions App | William Stewart | All rights reserved.
Thank you
Be in touch soon, thanks
Privacy Policy
Effective Date: June 21, 2025
Controller: William Stewart – sessionsapp@willstew.me
Website: https://wesauna.app1. Introduction
Welcome to the Sessions App (the “App”, “we”, “our”, or “us”), a wellness-focused iOS application that helps users build healthy sauna and cold exposure habits. Your privacy is important to us. This Privacy Policy explains how we collect, use, and protect your personal data when you use the App.By using the App, you acknowledge that you have read and agree to this Privacy Policy. If you do not agree with this policy, please do not use the App.2. Data We Collect
We collect limited personal information to provide and improve the App:a. Account Information
When you sign in, we use a third-party provider to authenticate your login via email. Your email address is stored securely.b. Optional Profile Data
You may optionally provide your name, city, country, and preferred temperature unit (Celsius/Fahrenheit). This helps us personalize your experience but is not required.c. Feedback and Support
If you contact us, we may collect your name, email, IP address, and technical data (e.g., device model) to respond and improve our service. We may retain these communications to help improve the App.d. Log and Diagnostic Data
In case of errors or crashes, we collect technical log data through third-party tools. This may include:Device type and OS versionIP addressTimestamps and app versionCrash logs and analytics3. How We Use Your Data
We use your data to:Authenticate you securelyImprove the app’s features and stabilityRespond to your support requestsUnderstand usage patterns to enhance experienceWe do not sell or share your personal data with marketers or advertisers.4. Data Storage and Security
Your data is stored securely in a managed backend. We apply industry-standard security practices to protect it. However, no system is 100% secure. While we do our best, we cannot guarantee absolute security of your data.5. Third-Party Services
We may use third-party services for authentication, diagnostics, analytics, and infrastructure. These services may have access to your data only to perform specific functions on our behalf and are contractually required to keep it confidential.Examples include:Apple App Store ServicesApple HealthKitSupabase (used for authentication and database storage)Please refer to their respective privacy policies for more details.6. Children's Privacy
This App is not intended for users under the age of 13. We do not knowingly collect personal information from children under 13. If you believe your child has submitted personal data to us, please contact us immediately and we will delete it.7. Your Rights (GDPR / User Privacy)
If you are located in the EU, UK, or other jurisdictions with data protection laws, you may:Request access to your personal dataRequest correction or deletion of your dataWithdraw consent at any timeRequest a copy of your data (data portability)To exercise these rights, contact us at: sessionsapp@willstew.meWe respond to all such requests within 30 days.8. Data Retention
We retain personal data only as long as necessary for the purposes described above. If your account becomes inactive, we may delete your data after a reasonable period.9. Changes to This Privacy Policy
We may update this Privacy Policy occasionally. If there are material changes, we will notify you within the App and on our website. You will be asked to review and accept the updated policy before continuing to use the App.10. Contact
If you have any questions or requests regarding your data, contact the Data Controller:William Stewart
Email: sessionsapp@willstew.me
Website: https://wesauna.app
Terms of Service
Effective Date: June 21, 2025
Controller: William Stewart – sessionsapp@willstew.me
Website: https://wesauna.app1. Acceptance of Terms
By downloading, installing, or using the Sessions App (the “App”), you agree to be bound by these Terms of Service (“Terms”). If you do not agree with these Terms, do not use the App.These Terms form a legally binding agreement between you (“you”, “your”) and the provider of the App (“Sessions App”, “we”, “our”, or “us”).2. Eligibility
You must be at least 13 years old to use the Sessions App. By using the App, you confirm that you meet this requirement and are not barred from using the App under any applicable laws.3. Purpose of the App
Sessions App is a wellness-focused iOS application designed to help users track and maintain healthy sauna and cold exposure routines. The App is for informational and lifestyle purposes only and does not provide medical advice.Always consult a qualified healthcare provider before making changes to your wellness, sauna, or cold therapy practices.4. User Accounts and Authentication
You may be required to create an account and log in to access certain features. You agree to provide accurate information and to keep your login credentials secure.You are responsible for all activity under your account. If you suspect unauthorized use, please contact us immediately at sessionsapp@willstew.me.5. Acceptable Use
You agree to use the App only for lawful, personal, and non-commercial purposes.You agree not to:Violate any applicable laws or regulationsUse the App to harass, harm, or threaten othersIntroduce malware or malicious codeAttempt to reverse-engineer, decompile, or disrupt the App or its serversUse automated scripts, bots, or scraping tools to interact with the App6. Intellectual Property
All content in the App, including code, design, text, logos, and graphics, is the property of William Stewart or its licensors. You are granted a limited, non-exclusive, non-transferable license to use the App for personal, non-commercial use only.You may not reproduce, distribute, modify, or create derivative works from any part of the App without prior written consent.7. Use in Sauna Environments
Sessions App includes a Companion Apple Watch App, which is provided to support your tracking experience — but it is not required for sauna or cold exposure use.Apple's own guidelines advise that iPhones and Apple Watches should not be exposed to environments with extreme heat or humidity, such as saunas. Use of your devices in these environments is entirely at your discretion.By using the App, you acknowledge and accept that:Use of your phone or watch in saunas or cold plunge environments may cause permanent damageSessions App is not responsible or liable for any device damage, malfunction, or loss that results from exposure to high or low temperaturesYou are solely responsible for decisions regarding how and where you use your devicesAlways follow your device manufacturer’s recommendations for safe operating conditions.8. Privacy
Your use of the App is governed by our Privacy Policy. By using the App, you consent to the collection and use of your data as described in that policy.9. Disclaimers
The App is provided “as is” and “as available” without warranties of any kind. We do not guarantee that the App will be error-free, uninterrupted, or meet your specific expectations.We expressly disclaim all warranties, including implied warranties of merchantability, fitness for a particular purpose, and non-infringement.10. Limitation of Liability
To the fullest extent permitted by law, Sessions App shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to:Loss of data or accessDevice or equipment damagePhysical injury or health issuesService interruptions or data inaccuraciesUse of the App is entirely at your own risk.11. Termination
We reserve the right to suspend or terminate your access to the App at any time and for any reason, including if you violate these Terms. Upon termination, your right to use the App will immediately cease.12. Modifications
We may revise these Terms at any time. If a material change is made, we will notify you via the App or our website. Your continued use of the App following such updates constitutes your acceptance of the new Terms.13. Governing Law
These Terms are governed by and construed in accordance with the laws of British Columbia, Canada, without regard to its conflict of law principles.14. Contact
If you have any questions or concerns about these Terms, please contact:William Stewart
Email: sessionsapp@willstew.me
Website: https://wesauna.app