Hashi by Solviq — Privacy Policy

Effective: 7 December 2026

Hashi by Solviq ("Hashi", "the app") is a puzzle game made by one person, Yusuf Arda Oğuz (Solviq). This policy explains what data the app handles and why.

The short version
Hashi has no accounts and no servers of its own. Your puzzles, progress, statistics and settings are stored only on your device.
If you play for free, the app shows a few ads after some puzzles. These ads come from Google AdMob, which collects some device data to deliver them (below).
The ads are non-personalised. Hashi does not track you across other companies' apps or websites, and it never asks for Apple's tracking permission.
If you have bought the one-time unlock, you see no ads, and the ads software is never started on your device.
Data stored on your device
Your puzzle progress, solve history, statistics, reflection cards, settings, and whether you have bought the unlock are kept in the app's storage on your device. We never receive them. Deleting the app deletes them.

Purchases
The one-time unlock is sold through Apple's App Store. Apple processes the payment; we never see your payment details. The app asks the App Store whether the unlock has been bought, so it can switch off ads and open the full Library.

Game Center
If you are signed in to Game Center, Hashi can submit your Weekly and Daily times and progress to Game Center leaderboards. That data is handled by Apple under Apple's privacy policy.

Ads (free play only)
When ads appear
Only for players who have not bought the unlock, and only as a full-screen ad when you leave a solved puzzle: after past Daily puzzles, and after some Library puzzles. Never during a puzzle, never in today's Daily or the Weekly, and never in your first 10 solved puzzles.

Who provides them
Google AdMob, using the Google Mobile Ads SDK. When the app requests or shows an ad, Google may collect:

Device identifiers: an identifier limited to the app or its developer (Hashi cannot access the advertising identifier, IDFA, because it never asks for tracking permission);
Approximate location: derived from your IP address (not GPS);
Ad interaction data: which ads were shown and whether they were tapped;
Diagnostic and performance data: such as crash information, app launch times and other technical data about how the ads perform.
Google uses this data to deliver ads, to measure them, to prevent fraud and abuse, and to improve its services.

Non-personalised ads
Hashi requests non-personalised ads only. These are not based on your past behaviour or profile; they may be based on context such as the app itself and your approximate (country- or city-level) location.

No tracking
Hashi does not track you across apps and websites owned by other companies, does not show Apple's App Tracking Transparency prompt, and does not use the advertising identifier.

Consent in the EEA, the UK and Switzerland
If you are in the European Economic Area, the United Kingdom or Switzerland, the app uses Google's User Messaging Platform to ask for your choices before any ad is requested. You see it only if you play for free, only when the law requires it, and only when ads would begin (after your first 10 solved puzzles). You can change your choices at any time in Settings → Privacy choices.

If you have bought the unlock
You see no ads and no consent form, and the Google Mobile Ads SDK is never started, so it collects nothing.

Google's policies
How Google uses information from sites or apps that use its services: https://policies.google.com/technologies/partner-sites
Google Privacy Policy: https://policies.google.com/privacy
How Google uses data for advertising: https://policies.google.com/technologies/ads
Google's EU user consent policy: https://www.google.com/about/company/user-consent-policy/
Children
Hashi is a general-audience puzzle game and is not directed at children under 13. It does not knowingly collect personal information from children.

Changes
If this policy changes, the new version will be posted on this page with a new effective date.

Contact
Questions about privacy: solviq.puzzle@gmail.com