Privacy Policy

What happens to your data.

The web version and the phone apps work differently, so they are described separately below. Version of 17 October 2026.

Home Support Русская версия

1. In short

Your records — tasks, goals, lists, notes, finances — live on your device: in your browser's storage if you use the web version, or on the phone itself if you use the app. The planner works without any sign-in. We ask for your phone number only when you pay — for the receipt. On iPhone you can optionally sign in with Apple so that your subscription follows you to a new phone. What goes to the server is what the assistant needs to answer, what is needed to process a payment and — if you turn it on — an encrypted copy for sync.

2. Web version

The web version at synapseapp.ru/app/ keeps your records in your browser's storage (localStorage) on this device. Until you turn on device sync (see section 3), there is no copy on the server: clear the site data, use private browsing or another browser — and the records won't be there. You can save a backup as a file in "Settings → Data".

The web version has no sign-in at all: we ask for neither your email nor your phone number (the phone number is needed only when you pay — for the receipt). A subscription is recognised by a code you enter yourself. Sync with your other devices is optional — how it works is described in section 3.

In your profile you can add a name and a photo, so that you are addressed by name rather than as "user". This is optional, and they stay in the same place as your tasks: in your browser's storage. The photo never leaves your browser. The name, if you add one, is included in the daily briefing so that Syn can address you by name; it goes nowhere else. The phone apps have no name field at all.

The "My finances" section follows the same rules: spending and income, debts together with the names of the people they mention, savings jars, envelopes, subscriptions and recurring payments are kept in your browser's storage. The service does not connect to any bank accounts or cards and will not do so — you enter the numbers yourself. These records are not sent to the server; there are two exceptions — asking Syn about money and the daily briefing — both described in the section on the assistant.

Exchange rates on the wide-screen finance dashboard are requested by your browser directly from cbr-xml-daily.ru (US dollar and euro at the Central Bank of Russia rate), CoinGecko and Binance (bitcoin). These services see your IP address, but not your records.

Voice input in the web version uses your browser's speech recognition: in Chrome and Safari the audio may be processed on Google's or Apple's servers. We receive only the resulting text.

3. Phone apps

On iPhone. Tasks, goals, stages, lists, notes, finances and settings are stored on the device, in a file that the system encrypts together with your passcode. If iCloud is turned on on the phone, a copy of your records is kept in your personal iCloud storage — it is run by Apple and we have no access to it. You can also move records between your devices with sync — see below.

Optionally, you can sign in with Apple so that your subscription follows you to a new phone. We receive only an anonymised Apple identifier and store its hash — no name and no email. You can delete the account in the app's settings.

Syn hints on the main screen. When you open the app, the titles of your tasks and goals with their due dates and completion marks are sent to the server. The server looks for overdue tasks and stalled goals using fixed rules, without an AI model, and does not store this slice. Hints can be turned off in the app's settings.

The app may ask for access to notifications, the microphone, speech recognition and Face ID. Each permission is optional and can be turned off in iOS Settings. Biometrics are handled by the system itself; the app never sees them.

On Android. Records are stored inside the app itself. If backup is turned on in Android settings, the system saves them to your Google backup together with other apps' data. You can move them to another device with sync (see below) or by saving a file in "Settings → Data" — the same file also protects your records if the app is uninstalled. The app asks for two permissions, each only when it is needed: the microphone — when you tap it in the assistant window, and notifications — when the first reminder is set. Declining doesn't break anything else. The app also restores reminders after the phone restarts. Voice is transcribed by the phone's system speech recognition service (usually Google's); only the text reaches our server. One difference from iPhone, stated plainly: there, records are kept in a file that the system encrypts together with the device passcode, while on Android they are stored inside the app — the system shields them from other apps, but they have no separate encryption. On an unlocked or reflashed phone this protection is weaker.

Device sync. Optionally — and only with a subscription — you can link devices with a short code so that tasks, goals, lists, notes and finances carry over between them: for example, between iPhone, the web version and Android. In this case records are copied through our server, but they travel there encrypted: the key is created on your devices at the moment of linking and never reaches the server, so all we hold is a block we cannot read, and we cannot see its contents. Until sync is turned on, none of this happens — records stay only on the device, as described above. You can turn sync off and delete the copy from the server at any time in settings; this does not touch the records on the device itself.

4. The Syn assistant

When you talk to Syn, the request goes to our server and from there to the model provider. Along with the text of your request, a slice of your workspace is sent: tasks with their dates, descriptions and subtasks, goals with their stages, and in the web version also lists with their items and the beginnings of notes. Without it the assistant wouldn't know what to reschedule or what you're asking about.

When you talk to Syn from the "My finances" section, money records are added to the slice: open debts with names and remaining amounts, the names of savings jars, subscriptions and recurring payments, the month's totals for spending and income, and the five largest categories.

When you build the daily briefing, the slice includes the name from your profile (if set), your available balance, open debts with names and due dates, charges due within the next week, the month's totals and largest categories, and savings jars with the amounts saved. These are the two cases in which finance records leave your browser, and both happen only on your action — the section itself sends nothing anywhere. If you listen to the briefing, its text is sent to our server and from there to a speech synthesis provider. If you don't want to share these figures with a third-party model provider, keep your finances without the assistant and the briefing: the whole section works without them.

On iPhone you can reach Syn not only in the app but also by voice — from the Home Screen widget. Your voice is turned into text by Apple's system speech recognition; the app does not store the audio and does not send it to our server — only the resulting text is sent, just like a regular request.

If detailed context is on — and it is on by default — a request from the app or from the widget may also send the assistant your goals, tasks, Syn memory, basic progress indicators and finance records: spending, income, debts, subscriptions. As in the web version, if you don't want to share these figures with a third-party model provider, don't use Syn — finances and everything else in the app work without it.

We don't store this slice. What stays on the server: a daily request counter tied to an installation identifier; your subscription status and its term; records of completed payments; the conversation with the assistant itself and its memory between conversations — without them Syn wouldn't remember what was said a minute ago. Syn's memory is built from your own messages: goals, motives, difficulties, habits. The conversation and memory are kept until you erase them in settings or ask us to. The server also keeps technical events and usage statistics tied to a hash of the installation identifier — with no IP address in plain form and no content of your records; they are kept for up to 30 days. No tasks, goals, notes or finance records remain on the server, except the encrypted copy if you have turned on sync.

5. Payment

Payments are accepted by YooKassa; card details are processed by YooKassa and never reach us. We store the fact of purchase and the amount, the subscription term, the phone number given for the receipt (with it and the last digits of the card you can find your subscription without the code), the access code — as a hash and in encrypted form, so we can show it to you on the "Subscription" page — the partner code, if one was used, and — if auto-renewal is on — the payment method identifier and the last four digits of the card, so we can show you exactly what is being renewed.

If you came through a partner's link, the partner's code is kept in your browser's storage for 30 days and sent along with the payment, so that the purchase is credited to the partner. The partner learns nothing about you — only the number of visits and payments.

You can unlink the card and turn off auto-renewal yourself on the "Subscription" page (in Russian) using your access code.

6. Website and analytics

The synapseapp.ru website pages use Yandex Metrica: it counts visits and records anonymised sessions (Session Replay) — except on the payment and subscription pages, where it is turned off — so we can see where pages are unclear.

In the web version of the planner at /app/ Metrica also runs, but differently: screen recording is turned off there. On the website pages there is nothing personal to record — just ordinary text; your screen in the planner holds your tasks, notes and money, and we won't record them for the sake of any report. Only visits and moves between sections are counted — nothing you have written.

The iPhone and Android apps have no Yandex Metrica, just as they have no advertising SDKs and no advertising identifier: they don't track you across other apps. The apps send technical events only to our own server (see section 4).

7. What you can delete and how

In the web version: "Settings → Data → Erase everything in this browser" — and no records remain anywhere, if sync was never turned on. The encrypted sync copy is removed with the "Delete the copy from the server" button in the same section. In the app: delete any record, erase the assistant's memory, and on iPhone delete the account entirely.

To have us delete what is stored on the server (subscription, counters, assistant memory), write to support@synapseapp.ru — we'll do it and confirm. Data disappears from the nightly database backups once those backups are rotated out.

8. Who processes the data

The operator is Arslan Temirkhanov, a self-employed individual in Russia (payer of the professional income tax), taxpayer ID (INN) 862001541373. The Synapse server is located in Russia. Model responses are produced by third-party AI providers through the OpenRouter service; their servers are located outside Russia. They receive the text of your request and the workspace slice described above, and — when you listen to the briefing — its text.

Full details are on the "Business details" page (in Russian).