You track your sleep and your steps. Now track your memory and focus.

Three short tests a day become a chart that is only yours.

Start your free month

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30 days with everything. No credit card. Then the free version, for as long as you like.

Your results in the MemoryProof app: the overall score, “Right around your usual lately”, with its line and the sleep line; then the Speed, Focus, Memory and Weekly tests, each within your usual range, and the night from the Oura Ring — Example data Your results, and your Speed test chart.

TodayCreate your account. No credit card.
30 days with everything
After 30 daysYou choose.
- Free version€0, for as long as you like
- Membership€8.49 a month, or €84 a year
Compare the two

4tests from published psychology research
182study findings in the free library.
0ad or analytics trackers. We sell no supplements.
30days money-back guarantee on your first purchase in the browser.

From day one

Check in. See your chart. Tag your day.

One test shows one moment. A few minutes a day shows your own pattern.

Check in

Three short tests a day. Speed: match symbols to numbers. Focus: repeat a path of squares. Memory: remember which pattern sat in which box. Once a week there is a picture test too.

Example data Today's check-in.
2

See your chart

Each check-in adds one dot to your chart. Within the first weeks, a shaded band shows your usual range, and one overall score combines your tests. Over the months, a long-term line shows how your scores move. A shaded band shows your usual range. Every result is compared only with your own earlier results, never with other people.
Speed test
Last 7 days: within your usual range.
- Your usual range
- Long-term line
- A day you tagged
Example data Your Speed test after six months.
Tag your day

A tag is a one-tap note on your day: coffee, a walk, a poor night, a supplement. With tags you find out which habits and supplements go with your better days, and which don't. Save a routine to tag several at once.

Example data Tag your day in one tap.

Built on the research

Each test comes from published psychology research. We adapted the tests for daily testing on a phone and stayed true to the original design.

The symbols, paths and pictures are reshuffled or replaced at every check-in. Every source is listed in the app.

Speed test: Adapted from the digit-symbol substitution task, which researchers have used for more than a century.
Focus test: Adapted from the Corsi block-tapping task (Corsi, 1972).
Memory test: Adapted from visual paired-associate learning (Sahakian and colleagues, 1988).
Weekly test: Adapted from the Mnemonic Similarity Task (Stark and colleagues, 2013).

After a few weeks

See what your good days have in common.

Does coffee change your scores? A walk before the check-in? A supplement you just started? Tag it. MemoryProof compares your days with the tag and your days without it, test by test, and shows the difference as a number and in percent.

Tags compared Members

3.1 more matches (7% better)
Walk before check-inSpeed test36 days with · 133 withoutConsistent pattern
No clear difference
CoffeeSpeed testFocus testMemory test85 days with · 84 without
Too early
Poor night4 days so far — 1 more to go.

Example data Three results from Tags compared.

Each tag gets one result per test: the difference, for example 3.1 more matches (7% better), and a plain label from “Too early” to “No clear difference” to “Consistent pattern”.

Tags compared in the app: Sleep, a consistent pattern on the Focus test; Walk before check-in, a consistent pattern on the Speed test with its amount, no clear difference on the Focus and Memory tests; Coffee, no clear difference on all three; Poor night, too early — Example data Tags compared, in the app.A finished experiment.

The experiment's result in the app, 28 days with a walk before the check-in: a consistent pattern on the Speed test with its amount and likely range, no clear difference on the Focus and Memory tests — Example data Tags compared, in the app.A finished experiment.

After 35 check-in days

Experiments Members

28 days with Walk before check-in vs your 84 days before

Speed testConsistent pattern

3.4 more matches (7% better) during the experiment — a consistent pattern.

Likely range: 2.6 more to 4.2 more matches

Focus testThe same
No clear difference
Memory test0.3 points higher (2% better)
No clear difference

Example data A finished experiment.

An experiment answers one question: does this one habit or supplement make a difference to my scores? Change one thing for four weeks: a walk before your check-in, a break from coffee, a supplement. The app compares those four weeks with your days before, test by test.

You already track your sleep. Put your memory and focus next to it.

Speed test

Last 7 days: within your usual range.

Speed test
Your usual range
Long-term line
A day you tagged
Total sleep (h)
After a short night

Example data After the four shortest nights, the Speed test score fell below the usual range.

Oura Ring

Connect it directly. You get total sleep, deep sleep, REM sleep, heart rate and heart-rate variability.
Apple Health
In the iPhone app

For Apple Watch, Whoop, Garmin and every other wearable that saves its sleep in Apple Health. Switch on Apple Health in your wearable's app, then connect Apple Health in MemoryProof. MemoryProof reads total sleep, and the deep and REM sleep your device saves there.

The iPhone app is coming to the App Store.

Connecting your wearable and the sleep line on your charts are free. How your sleep compares with your scores is part of the membership.
Read only. MemoryProof writes nothing to Oura or Apple Health.
No wearable? Rate your night from 1 to 10 in your check-in.

Lab values Members

Type in your blood results, or take a photo of the report and confirm what the app read. Your values appear on the same timeline as your scores, exactly as entered. The photo is not stored.

Lab values: Ferritin, Vitamin B12 and Vitamin D, each with its latest value and date — Example data Your lab values, as entered.

Tags compared and lab values are included in your free month. Experiments start after 35 check-in days.

Start your free month

Sign-up opens soon.

Your first month is free. The free version stays free.

30 days with everything, no credit card. Then keep the free version or become a member.

MemoryProof Membership

€8.49 a month

Or pay yearly: €84 a year — works out at €7 a month

30-day money-back guarantee on your first purchase in the browser.

Everything in the free version, plus:

Your usual range and overall score
Your full history and the long-term line
How your tags and your sleep compare with your scores
4-week experiments
Sleep from your Oura Ring
Sleep from Oura or Apple Health
Sleep from Apple Health
Lab values on your charts

Start your free month

Sign-up opens soon.

Your free month includes everything in the membership.

Free version

€0 for as long as you like

Your daily check-ins and each test's score
Your last 30 days as a chart
Tagging your days
Connecting your Oura Ring
Connecting your Oura Ring or Apple Health
Connecting Apple Health
The evidence library
Exporting all your data

Payment runs through Stripe (a payment company used by millions of businesses). MemoryProof never sees your card number and stores no card details.

Prices include VAT. The membership renews automatically every month or year until you cancel. Cancel any time in the app; your membership stays on until the end of the period you paid for. After your free month nothing is charged, and nothing you recorded is deleted. Money-back guarantee: within 30 days of your first purchase in the browser you get the full price back in the app, without giving a reason. Your 14-day right of withdrawal by law stays as it is. For purchases in the iPhone or Android app, Apple's or Google's refund rules apply. MemoryProof is for people aged 16 and over. Terms, cancellation and withdrawal ›

What the studies found. Including the ones that found nothing.

Plain summaries of published studies on supplements and substances. In the library now: omega-3, B vitamins, curcumin, creatine, lithium, EGCG and resveratrol. Every source is listed.

Study findings: 182
Supplements and substances: 7

Nothing in the library is for sale: no shop, no affiliate links, no sponsors. It does not tell you what to take.

We add one new supplement every week. Vote in the app for the one you want next, or suggest your own.

The evidence library: the list of supplements, each with coloured dots for how strong the evidence is, and the card to vote for the next one — Example screen The library is free, for good.

Your data stays yours.

No ad or analytics trackers. Not in the app, not on this website. No tracking cookies.
On your device and on our own server. Nothing is lost when you change phones.
Never sold. Never shared with advertisers, data brokers or social networks.
Export or delete, any time. Download everything as a spreadsheet, or delete your account and our copy.

Who helps us run it: Cloudflare hosts our server, and Stripe handles payments and never sees your check-ins. The full list is in the privacy notice ›

MemoryProof is built and run by Simon Bechtel Engineering in Warsaw. Write to us: hello@memoryproofapp.com.

Your data in the app: the switch to help improve MemoryProof, where your data is kept, and buttons to export or erase it — Example data Your data, in the app.

Short answers

How much time does it take?

A few minutes a day for the three tests. Once a week the picture test is added. You see your first score on day one.

Is this brain training?

No. MemoryProof measures your memory and focus and shows them over time, the way a sleep tracker shows your nights.

What happens after the free month?

You keep the free version. If you become a member later, your full history, your usual range and your tag results are there again. The app reminds you before the free month ends.

Can I get my money back?

Yes: on your first purchase in the browser you get the full price back within 30 days, under You in the app, without giving a reason. For purchases in the iPhone or Android app, Apple's or Google's refund rules apply.

Who takes my payment?

Payment runs through Stripe (a payment company used by millions of businesses). MemoryProof never sees your card number and stores no card details. The payment page and your receipt say “Sold through Link”. Link belongs to Stripe; it takes the payment and emails your receipt.

Where can I use it?

In any modern browser on a phone, tablet or computer. The iPhone app is coming to the App Store. One account works everywhere. The app is in English, German and Russian.

Can I delete my data?

Yes, at any time. “Delete account & synced copy” in the app removes your account and our server copy straight away. We keep only what the law requires, such as the record of a purchase or a withdrawal. You can download everything as a spreadsheet first.

You track your sleep and your steps. Now track your memory and focus.

Check in. See your chart. Tag your day.

Check in

See your chart

Tag your day

Built on the research

See what your good days have in common.

Tags compared Members

Experiments Members

You already track your sleep. Put your memory and focus next to it.

Oura Ring

Apple Health

Lab values Members

Your first month is free. The free version stays free.

MemoryProof Membership

Free version

What the studies found. Including the ones that found nothing.

Your data stays yours.

Short answers

Your memory and focus, on the record.