Log
Recorded in seconds.
A dedicated number pad that automatically moves to the next field. Just enter SYS and DIA; pulse, tags, and a note are optional. Your medications are already available as tags.
The blood pressure app for iPhone Free · no ads · no subscription
Understand
your blood
pressure.
Don’t just log it.
Log a reading in seconds. Systole classifies it using current guidelines, shows your trend and turns it into a PDF report for your doctor. Plus reminders to measure and take your medication – no account, no ads, end-to-end encrypted.
No account · App Store privacy label: Data Not Collected
- iPhone · iOS 18 or later
- No tracking
- English & German
- Guidelines
- 4 ESH, ESC, AHA, WHO
- Sync
- 2-way with Apple Health
- Export
- PDF + CSV Report for your doctor
- Price
- €0 No ads, no subscription
The app at a glance
Everything you need for your blood pressure. Nothing to distract you.
Calm, fast and thoughtfully designed – just like you’d expect on your iPhone. From your first tap to a report for your doctor.
Apple Health
In sync both ways.
Your readings sync to Apple Health, and readings from other apps and devices appear in Systole. If a pulse reading is missing, Systole adds it from Health.
What the traffic light means
Understand what your numbers mean.
Tap the traffic light to see where your reading falls and the thresholds for each category. Available for all four guidelines.
Classification using ESH 2023 · values in mmHg
SYSDIA
Grade 3
Grade 2
Grade 1
High-normal
Normal
Optimal
120130140160180808590100110Your latest reading124/79
| Level | SYS | DIA |
|---|---|---|
| Grade 3 | ≥ 180 | ≥ 110 |
| Grade 2 | 160–179 | 100–109 |
| Grade 1 | 140–159 | 90–99 |
| High-normal | 130–139 | 85–89 |
| NormalYou | 120–129 | 80–84 |
| Optimal | < 120 | < 80 |
If systolic and diastolic values fall into different categories, the higher category applies. This classification does not replace a medical diagnosis.
How to measure
Four steps to reliable readings.
- 1RelaxSit upright and lean back. Beforehand, skip coffee and strong tea and avoid physical or emotional strain.
- 2Put On the CuffDepending on your device, the cuff sits on your upper arm or wrist, always at the height of your heart. Keep your arm relaxed and supported.
- 3Wait, Then MeasureWait five minutes without crossing your legs. Then measure and repeat two or three times, with half a minute’s break in between.Repeated readings are usually lower. What counts is the average of the last two.
- 4Log ItLog your readings in Systole to track changes over time and share them as a PDF or CSV.
Based on the recommendations of the German Heart Foundation (Deutsche Herzstiftung).
History
The trend, not just the moment.
Daily averages as clear lines, each reading as a dot, and your targets as dashed lines. Pulse is shown separately below, keeping the chart easy to read.
SystolicDiastolicPulseTargets 120/80
Medications
Doses you won’t forget.
One tap on “Today” and a little confetti—you’re done. See 14 days at a glance and build your streak.
Reminders
Friendly reminders. Only when needed.
Set up to four daily blood pressure reminders. If you’ve already logged a reading or marked your dose as taken, the reminder stays quiet.
Widgets
On your Home Screen and Lock Screen.
Your latest reading at a glance. Mark your medication as taken from a widget, or add a reading from Control Center.
Export
A report for your doctor.
A PDF with a summary, chart, readings table, and medication log. Or a CSV for your own analysis.
App lock
For your eyes only.
With Face ID, Touch ID or your passcode. Your readings stay hidden in the app switcher.
And all the details
Made with love, down to the heartbeat.
- Heart beating to your pulse
- Haptics when saving
- Daily average or latest reading
- Targets in steps of 5
- Custom tags
- Synced via iCloud
- Dark Mode
- Dynamic Type and VoiceOver
- English and German
Download for free on the App Store
No account · App Store privacy label: Data Not Collected
The traffic light
Classified. Using your chosen guideline.
Systole classifies every reading using ESH 2023, or ESC 2024, AHA/ACC 2025 or the WHO hypertension threshold if you prefer. Systolic and diastolic values are classified separately, and the higher category determines the overall result. Try it.
Guideline
Sample reading
Values in mmHg, office blood pressure in adults. Systole is not a medical device and does not diagnose.
Saved · ESH 2023
Keep an Eye on It
SystolicHigh-normal
DiastolicHigh-normal
132/86mmHg
High-normal
Privacy
Your health data stays with you.
No account, no server of our own, no analytics. Systole stores your data on your iPhone and syncs only through your private iCloud storage.
No tracking
No ads, no analytics or crash SDKs. Your readings are never shared with third parties.
Your iCloud
Readings and settings sync through your private iCloud storage. There’s no Systole server.
End-to-end encrypted
Your readings, medications and targets are end-to-end encrypted in iCloud. They can only be read on your devices.
You decide
Apple Health only if you connect it. Exports only if you share them. Plus the app lock with Face ID.
Free
All features. For everyone. Free forever.
The app is free, with no ads and no subscription. There is no corporation behind it. If it helps you in everyday life, you can support its development with a tip in the app.
100% free
Every feature, forever.
- No ads
- No subscription
- No tracking
- No account
- No data shared with third parties
- No paywall
A tip in the app is optional and unlocks nothing.
Why? Here’s why.
Measuring your blood pressure regularly is one of the simplest ways to look after your health. Yet its value is often overlooked.
When I looked for an app to track my own readings, none felt quite right. Some were awkward to use, others lacked features I needed, and the design wasn’t always what I wanted. So I built Systole the way I wanted it to work.
Systole is my way of giving something back to everyone who wants to keep an eye on their health, just as I do. That’s why it’s free, with no ads and no subscription.
Erik (developer of Systole), Reutlingen
Download for free on the App Store
Already using Systole? Leave a tip: in the app via Apple, or here via Ko-fi. Optional, unlocks nothing.
FAQ
Good questions. Short answers.
What you might want to know before downloading, from cost and privacy to Apple Health.
What is Systole?
Systole is an iPhone app for recording and understanding your blood pressure readings. You add a reading in seconds, Systole classifies it by a medical guideline and shows you how your readings change over time. It also reminds you to measure and to take your medications, works with Apple Health and creates a report for your doctor.
Who is Systole for?
For anyone who measures their own blood pressure and wants to stay in control of their everyday life: recording readings, getting reminders to measure and tracking their medications so they never miss a dose again. The classification follows guidelines for adults.
Is Systole really free?
Yes. Every feature is free, with no ads, no subscription and no paywall. If you like, you can leave a tip in the app. It’s optional and unlocks nothing.
Do I need an account?
No. Download Systole and add your first reading. There’s no sign-up and no server of our own.
Who can see my readings?
Only you. Systole stores your data on your iPhone and syncs it through your private iCloud. There, your health data is end-to-end encrypted, so not even I as the developer can access it. App Lock adds Face ID, Touch ID or your passcode on top.
Can I turn off iCloud sync?
Yes, in Settings under “iCloud”, separately on each device. When you turn it off, you choose whether your data stays in iCloud or is deleted there. It always stays on your iPhone.
Does Systole work with my blood pressure monitor?
Systole doesn’t connect to monitors directly. If your monitor’s app saves readings to Apple Health, Systole picks them up from there. Anything else takes just a few seconds to enter yourself.
How does Systole work with Apple Health?
Once you connect Apple Health, your readings are saved there and readings from other apps come to Systole. If a reading has no pulse, Systole adds an average from your heart rate data in Apple Health, as close to the time of the reading as possible. If no values are available around that time, Systole uses the average for the same day. With no heart rate data that day, the pulse stays empty. Deleting something in Health never changes Systole. Medications stay in Systole, because Apple currently doesn’t let other apps save them to Health.
Can I bring over my existing readings?
Yes, if they’re in Apple Health: on the first sync, Systole imports your entire history. Importing from files isn’t supported.
Which guideline should I choose?
ESH 2023 is the default in Systole. You can also choose ESC 2024, the US guideline AHA/ACC 2025 or the WHO hypertension threshold of 140/90. If your doctor uses a particular guideline, you can select the same one in Systole. The app uses categories for blood pressure measured in a doctor’s office in adults. Different thresholds apply when assessing readings taken at home. The app’s classification is not a diagnosis. Switching changes the classification, colors and summary; your saved readings stay unchanged.
Does Systole replace seeing a doctor?
No. Systole helps you record your readings and classify them by published guidelines. Systole is not a medical device, doesn’t diagnose anything and doesn’t replace medical advice or treatment. If you have symptoms, talk to your doctor; in an emergency, call 112.
How do I share my readings with my doctor?
Export them as a PDF with a summary, history chart, readings table and medication intakes, either as daily averages or one by one. For your own analysis there’s CSV. You share the file through the share sheet, with whoever you choose.
Is Systole available for iPad or Android?
No, Systole is currently available for iPhone only, with iOS 18 or later.
I have an idea or found a bug. Where do I send it?
Write to me at hallo@systole.eu. Every bit of feedback helps make Systole better.
Your heart deserves more than a scrap of paper.
Get Systole for free and add your first reading. It takes less than a minute.
Download for free on the App Store 
Or scan the code with your iPhone
Or scan the code with your iPhone For iPhone with iOS 18 or later · English and German