Privacy Policy

Effective September 12, 2026 · Nerkh iOS app & nerkh.org

Short version: no accounts, no ads, no cookies, no tracking, and nothing that identifies you. We count anonymous usage events (like “converter opened”). Those events are not linked to a person, but they do carry a random per-installation ID and an approximate location worked out from your IP address — both described below. On the website we also record where on the page people click and how fast the page loads, but never a recording of your screen or your session. From version 1.1.5, if you turn on rate alerts, our server stores the alerts you set — and nothing else — so they can reach you while the app is closed. Version 1.1.4 and earlier send us nothing at all.

What the app stores — on your device only

Your preferences — hidden tiles, display unit (Toman/Rial), and widget currency choices.
Your rate alerts — the currency, direction, and threshold you set.
Rate snapshots — recent rates cached locally so charts work offline.

None of this leaves your device, and deleting the app deletes all of it. From version 1.1.5 there is one exception — rate alerts, if you allow notifications — described in full below.

Network requests

The app and its widgets fetch exchange-rate data from our content delivery network (Amazon CloudFront). Like any web server, the CDN briefly processes your IP address to deliver the response; we do not use it to identify you and we keep no user database. No cookies, no device identifiers, no fingerprinting.

Analytics

As promised below under “Changes”, here is exactly what we added and how it works. The app and this website count anonymous usage events with PostHog, hosted in the EU (Frankfurt), so we can see which features are used and make Nerkh better.

What we record — which screens are opened, which features are used, and which currency codes are viewed (for example “USD detail opened”). Never the amounts you convert, the alert thresholds you set, or anything typed into the app.
No accounts, no profiles, no advertising IDs — we never identify you and never link events to a person. PostHog does give each installation of the app a random ID so that events from one installation hang together in a chart. It is generated on your device, is not your Apple ID and not one of your device’s own identifiers, is never shared, and it ends when you delete the app.
Approximate location — from the IP address your request arrives with, PostHog works out roughly where in the world the app is being used, so we can see which countries Nerkh matters in. It is city-level at best — typically accurate to tens of kilometres, often far worse — and it is never combined with anything that identifies you. Nerkh never asks for location permission and never reads your device’s GPS.
On the website only — how the page is used — where on a page people click, clicks that hit something which is not actually a button, and repeated clicks in the same spot. We use this to find parts of the page that look tappable but do nothing. It is click positions and the element clicked, not a recording: the website does not record your screen, your mouse movements, your typing, or your session.
On the website only — page speed and errors — how long the page takes to load and become usable, and a report if the page’s JavaScript fails. An error report carries the error message, the line of our code that broke, and the page address. We use these to fix a slow or broken page.
No cookies on the website — instead of cookies or local storage, the website uses a non-reversible, daily-rotating server hash, so you appear as a brand-new visitor every day by design. This is also why the website cannot offer session recordings or surveys: both require storage we do not use.
No cross-site tracking — nothing follows you to other apps or websites, and we share nothing with ad networks.

Rate alerts and notifications

Applies to Nerkh 1.1.5 and later. In version 1.1.4 and earlier, rate alerts are checked only on your device and nothing about them is sent to us. This section is published in advance, as promised under “Changes”.

An alert is only useful if it reaches you when the rate actually moves — which is usually while the app is closed. Your device cannot check prices while it is not running, so from 1.1.5, if you allow notifications, the check happens on our server instead.

What we store — your device’s notification token (an anonymous code Apple issues to this one installation, which Apple itself changes from time to time) and the alerts you set: currency, direction, and threshold. That is the entire record.
What we do not store — no name, email, account, device identifier, advertising ID, or location. Nothing links this record to you, and nothing links it to the anonymous analytics described above. We cannot tell who you are from it, and we have no way to look you up.
How long — the record is deleted automatically 90 days after your app last contacts us, so an uninstalled app disappears on its own. Each alert is removed as soon as it fires.
How to remove it — deleting your alerts in the app deletes the record from our server. Deleting the app has the same effect within 90 days.
Where — on Amazon Web Services in the United States.

If you decline notification permission, none of this happens. No token is created, nothing is sent to us, your alerts are checked only on your device while the app is open, and they simply stay visible inside the app — exactly as Nerkh worked before.

The website

nerkh.org sets no cookies; it runs only the anonymous, cookieless analytics described above. Rate tiles on the homepage are fetched from the same CDN described above. Fonts are served by Google Fonts, which receives the standard request metadata (such as your IP address) needed to deliver the font files — see Google Fonts privacy FAQ.

Children

Nerkh is a financial-information utility, is not directed at children, and has no way to tell how old anyone is — because it collects nothing that identifies anyone, of any age.

Changes

When this policy changes, the change is described on this page before it ships. Four changes so far: anonymous analytics (July 19, 2026), server-side rate alerts (August 2, 2026), a correction to the analytics section (September 6, 2026), and website interaction data (September 12, 2026).

On September 6, 2026 nothing about the app changed; the earlier wording said “no identifiers” and did not mention location, which understated what the analytics have recorded since July 19. The per-installation ID and the approximate, IP-derived location are now described in full.

On September 12, 2026 the website — not the app — began recording two further things, both described in the analytics section above: where on the page people click, and how fast the page loads or whether it breaks. This is a real increase in what the website measures, so it is written down here rather than folded quietly into “which features are used”. It still sets no cookies, still identifies nobody, and still does not record your screen or your session.

Contact

Questions? Email alisaghi0931@gmail.com.