Privacy, in plain English.
We collect what we need to keep our apps working and improving. We don't sell your data. Here's the long version.
The short version
We don’t run user accounts. We don’t sell your data. We don’t use ad trackers. Your calculation inputs and results never leave your device. The apps do send a small amount of anonymous diagnostic data to help us catch crashes and understand which Pro features matter most — details below.
Our calculator apps (ShopCalc, WelderCalc, BuilderCalc, ElectricianCalc, ShopCAM, FabCalc)
All calculation work happens entirely on your device. Your inputs, results, and saved data are never transmitted anywhere.
The apps include a lightweight anonymous diagnostic layer that sends three categories of events to our own server (support.doublevision.company):
- Crash & error reports — when JavaScript throws an unexpected error, a report is sent containing the error message, a stack trace, the app version, and the device platform (iOS/Android). No personally identifiable information is included.
- Usage & paywall events — which calculators and features you open, and taps on Pro-gated features or the “Unlock Pro” button (e.g. “tig”, “framing”), with the app version and platform. This tells us which features matter and which ones nobody finds. Your inputs and results are never included.
- Purchase-flow diagnostics — when a Pro purchase succeeds or fails, we record the product involved (e.g. “pro_lifetime”) and, on failure, the store error code, so we can catch broken checkout. We never see your payment details — Apple and Google process the payment entirely.
To count devices and group events from the same session, the apps attach a random device identifier — a UUID we generate ourselves and store only inside that app. It is not your advertising ID, not Apple’s or Google’s device ID, is never shared across apps or with anyone else, and resets if you reinstall. A per-launch session ID groups events from a single sitting. Neither can identify you.
These events are anonymous — we have no way to tie them back to you as an individual. We retain them for up to 90 days for debugging and product decisions, then they’re deleted.
The optional Pro subscription or one-time unlock is processed by Apple (App Store) or Google (Play Store). They handle the payment; we receive a payout, not your card details.
Our websites
doublevision.company and nomad.doublevision.company are static marketing pages served through a CDN. We don’t set tracking cookies, we don’t run third-party advertising tags, and we don’t have a session/login system on those pages. Standard hosting access logs (IP address, user agent, requested URL, timestamp) are kept short-term by our hosting provider for operational purposes.
Contact & inquiry links
The sourcing, manufacturing, custom software, and support inquiry links on doublevision.company open your email client with a pre-filled message addressed to us. When you hit send, your email provider delivers it to our inbox. We see whatever you put in that email and we keep it as long as we need it to do business with you.
Phone & email
If you call or email us we keep normal business records of the conversation (your phone number, email address, what we discussed) so we can follow up and so we have a record if there’s a dispute later. We don’t use it for marketing.
What we don’t do
- We don’t sell your data. Not now, not later.
- We don’t collect your name, email, location, or any personally identifiable information in the apps.
- We don’t run advertising/retargeting trackers (Google Ads, Meta Pixel, etc.).
- We don’t build user profiles or share your contact info with third parties for marketing.
Service providers we use
The handful of vendors that touch any of this:
- DigitalOcean — web hosting for our marketing sites, inquiry-form delivery, and the anonymous diagnostic endpoint the apps report to.
- Cloudflare — CDN and basic DDoS protection in front of those sites.
- Apple App Store — distributes the iOS apps and processes in-app purchases.
- Google Play — distributes the Android apps and processes in-app purchases.
- Our email provider — receives and stores email you send us through forms or directly.
We’ll update this list before we add any vendor that meaningfully touches your data.
Your rights
The diagnostic events we collect are anonymous — there’s nothing to link back to you. If you’ve emailed us or sent an inquiry through one of our forms and you want us to delete what we have, email support@doublevision.company and we will. We respond inside 30 days.
Children
Our products aren’t directed at anyone under 16. We don’t knowingly collect data from minors.
Changes
If we change this policy materially, we’ll update the effective date at the top of this page.
Contact
Questions? support@doublevision.company or call .