Written in full before you pay. If anything here is unclear, the reading most favourable to you is the correct one.
Terms version 1.3 · 6 September 2026 · Abdulsamet, sole trader · Türkiye
Email abdulsamet@addiem.net within 14 days of purchase and you get your money back in full. You do not have to explain why, you do not have to delete anything, and the request will not be argued with.
Immediately after payment, as a download:
macOS 12 or later · Windows 10 or later, 64-bit · or any current desktop browser for the single-file version. A window of at least 1000 px wide. No internet connection is required at any point, including the first launch.
The macOS app has no Apple Developer ID signature and has not been notarized. The Windows files have no Authenticode publisher signature. macOS will block the first launch; Windows may show an unrecognized-app notice, and some managed computers may block unsigned software with no user override. The public installation and release record shows the exact app-specific paths, limitations, byte sizes and SHA-256 fingerprints. It never asks you to disable security globally. The single-file browser version included after purchase has no application code-signing prompt. Any future signed or notarized build is included at no extra charge for existing buyers.
Email, from the person who wrote the software. I aim to answer within two business days and usually do it faster. Support is provided by one person and has no guaranteed response-time agreement. If I ever stop maintaining Addiem, the version you downloaded keeps working. It runs entirely on your machine and needs nothing from me to keep running. Maintained update links and their checksum records are sent to the purchase email; there is deliberately no silent automatic updater because the application cannot contact a server.
Addiem collects nothing. There is no account, no signup, no telemetry, no analytics and no server. The desktop application blocks outbound network requests at the main process.
Desktop edition: your data is a plain JSON file in your own user folder —
addm-state.json, with atomic writes and automatic daily backups kept for 30 days.
You can read it, copy it, back it up and delete it yourself.
Single-file HTML edition: your archive stays in that browser's local storage. It has no automatic file snapshots and may be cleared by browser or privacy settings; export JSON regularly. Both editions provide one-click JSON export and import.
No analytics, no cookies, no trackers, no third-party requests. The free calibration test runs entirely in your browser and nothing you enter in it is transmitted or stored anywhere. Payment is handled by Creem, who act as merchant of record and receive your billing details directly — those never pass through Addiem or this site. As merchant of record they also calculate and remit the sales tax or VAT for your country. Addiem's list price is $49. An authorized promotional checkout may show a lower final price. Any applicable tax is included in the total shown before payment: the final total displayed at checkout is the price you pay and controls if a promotional page or general price statement differs. The merchant of record is named on the checkout page and on your receipt.
Sold by Abdulsamet, sole trader, Türkiye, through Creem as merchant of record. Creem's own terms cover the payment transaction itself. Nothing here limits any statutory consumer right you have where you live; where a local right gives you more than this page does, the local right wins.