A POTS diary that shows what a day costs you.
Bucket is an iPhone symptom tracker made for POTS (postural orthostatic tachycardia syndrome). Log heat, long workdays, exercise and how you feel, and it adds your sleep and heart data from Apple Health. Bucket shows how a day’s load adds up, and over time what tends to come before your dizzy, foggy days.
What people with POTS often log.
What they met and did
Heat and hot weather
Long workdays and long spells standing
Exercise and days out
Short nights, being unwell, your period
Fluids and salt, compression and medicines
How they felt
Dizziness
Palpitations
Brain fog
Tiredness
Struggling to stay upright
Examples of what people often track — not a list of causes or symptoms to look for. You choose what to log, and Bucket learns your own pattern.
Asked in POTS’s own words.
When you set Bucket up, you choose every condition you have or think you might — diagnosed, suspected or still exploring. Each brings a question of its own, in words people with it use. For POTS it’s “Standing” — fine, usual or can’t stay up. Bucket doesn’t ask it every day, only now and then, after a heavy spell.
Your entries fill a bucket that drains over the following days, so you can see the load building. Once there’s enough in your diary, Bucket shows what tends to come before your bad days — the same day or up to about three and a half days earlier.
Pattern in your logs · example
Long shifts tend to be followed by dizziness the next day.
8 of 11 times · 6 separate episodes · held in both halves of your data
An example of how Bucket words a pattern. It describes what tends to follow what — never what caused it.
Your bucket went near the top. Two taps help Bucket learn what matters for you — skip either.
How did you sleep?
- Badly
- OK
- Well
Standing
- Fine
- Usual
- Can’t stay up
What Bucket does for POTS.
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A guided stand test
With an Apple Watch, Bucket walks you through a stand test — five minutes lying down, then ten standing — while your Watch reads your heart. You keep the numbers: lying, each standing minute and the rise. Numbers to take to a clinician, never a verdict.
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Your heart against your own usual
With a Watch, your resting heart rate is shown against the middle of your last 30 days, and marked when it’s 5 or more above. Sleep, steps and heart-rate variability come from Apple Health and stay on your device.
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Today’s spend
Shifts, workouts, days out and caring are added up as today’s spend, on the same scale as the bucket, and shown against your usual day.
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What helps, from your own records
Log fluids and salt, compression or rest as things that help. One only starts taking anything off your bucket once your own records back it up.
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Weather, added for you
Heat, pressure, pollen and air quality for your rough area are added each day, so a hot spell shows up in your diary without typing.
Try the free stand test in your browser — no app, nothing stored.
Meet Priya.
Priya has POTS and works full time. Her bucket shows what a workday and a hot spell cost her.
Priya is one of three made-up sample people built into the app, so you can try it before you’ve logged anything. A sample — not a testimonial.
Questions about Bucket and POTS
Is there a symptom tracker for POTS?
Yes — Bucket is an iPhone symptom tracker made for POTS, among other conditions. You log heat, long workdays, exercise and how you feel — dizziness, palpitations, brain fog, tiredness — and it adds sleep, steps, heart-rate variability and resting heart rate from Apple Health, plus the day’s weather. It shows how a day’s load adds up and what tends to come before your symptoms.
Can I do a stand test at home?
You can record your own numbers with Bucket’s free stand test at mybucketlog.com/stand-test: it times five minutes lying down and ten standing, helps you count your pulse at set points, and gives you a printable sheet to take to a clinician. It shows readings, never a verdict. If you faint on standing, have someone with you or ask your clinician first.
Will a stand test tell me if I have POTS?
No. A stand test gives numbers — your heart rate lying down and at points while standing — and Bucket shows those numbers and nothing else. Only a clinician can weigh them, alongside everything else about you.
Does Bucket work with Apple Watch for POTS?
Yes. With an Apple Watch, Bucket shows your resting heart rate against your own usual, runs its guided stand test on your wrist, and lets you log and answer dose reminders without your phone.
Can I track salt, fluids and compression in Bucket?
Yes. Fluids and salt, compression and rest can be logged as things that help. Bucket only lets one take anything off your bucket once your own records back it up.
Can Bucket show what a workday costs me with POTS?
Yes — Bucket adds up what you’ve done today, at work and at home, as today’s spend, and shows it against your usual day. If a heavy day tends to be followed by a bad one a day or two later, your patterns will show that too.
Who wrote this.
Bucket is made by Chris, who has a connective tissue disorder and hypermobility, gets migraines, and is working towards an MCAS diagnosis through the NHS — and built Bucket to find the delayed reactions that were impossible to spot alone. Read Chris’s note.
This page describes what Bucket does. It doesn’t explain POTS, and it isn’t medical advice. To read about POTS itself, see the NHS page.
Checked against the Bucket app on 28 October 2026. Spotted something wrong? Tell us.
Often travels with
EDS/HSD · MCAS · ME/CFS · Long COVID
Free, no sign-up
- Stand test Time five minutes lying and ten standing, count your pulse, print your numbers. Nothing is stored or sent.
- Try the bucket Tick what happened this week and watch a sample bucket fill and drain.
- Appointment sheet One page to fill in before you see a clinician. Print it or save it as a PDF.
- Paper symptom diary A week on one page — what you met, what you did, how you felt.
Be first to try Bucket for POTS.
One email on launch day with the App Store link. That’s all.
Planned launch price: 30 days free, then £12.99 a month or £89.99 a year. Cancel any time in iPhone Settings.