Privacy Policy
This policy explains how Premsan Inc (“Premsan”, “we”, “us”) handles personal data in Coupam — this website, the web app, the API, and the Coupam apps for iPhone, iPad and Android. Premsan is the controller of that data.
1. What we collect
- Your account. Your name, your email address, and either a password — stored only as a hash — or, when you sign in with Apple or Google, your identifier there and the sign-in tokens the provider gives us. Each session records the IP address and the browser or device it was opened from, and when it expires. We also record the date on which you accepted the Terms, and which version.
- Your coupons. Each coupon’s title, its value and currency, its rules — a maximum discount, a minimum purchase, the product it needs, a number of redemptions, the days it runs — its codes, and the currency you chose last.
- Your redemptions. For each redemption, the code, the purchase amount you entered, the discount, and when it happened. We do not ask who your customer is: a code and an amount carry no name, address or contact.
- Your designs. For each coupon you design: the design and every version of it, its renders, the messages you exchange with the assistant about it, the part of the design you point at, and the images you upload — photos, logos and SVG files. Your images form one library shared by all your designs. What goes in is your choice, and you can delete any coupon or image at any time.
- The plan. When your free week began, how many design messages you have sent in it or in the current month, and the state of your subscription. On the web, payment is taken by Stripe: it receives your email address and your account id, and your card details go to Stripe and never reach us. We keep the subscription’s id, your customer id at Stripe, when the current period ends and whether it renews. In the app, payment is taken by the App Store or Google Play; we receive the transaction’s id, confirm it with Apple or Google, and record it against your account.
- Help. When you write to us from Help, we keep your messages, the pictures you attach, and details that help us answer: whether you wrote from the web or the app, your browser or app version and operating system, your language, the screen you were on, the size of your window or screen, your time zone, and your most recent failed requests. They are kept with your account until you delete it. Our team reads and answers them in our own support tool.
- Usage. How many times the assistant ran and how many model tokens it used each month, kept inside your own account. Server logs hold request metadata, including your IP address, and error reports for a short time, for security and debugging.
- The bot check. Cloudflare Turnstile runs on our sign-in and sign-up pages, and in the app’s sign-in screen, to tell a person from a script.
- Nothing else. There is no advertising, no analytics, no tracking across sites or apps, no advertising identifier, and no data broker.
2. What we do with it
We use personal data to run Coupam: to keep your coupons, codes and redemptions, draw your codes, make, render and check your coupons’ designs and the files you download, sign you in, send you the emails the account needs — a verification link and a password reset — take payment and keep your subscription’s state, keep the service running and prevent abuse, answer you when you write to us, and meet legal obligations. We do not use your messages, images or designs to train models, we do not sell personal data, and we do not share it for advertising.
3. Why we are allowed to
Where the GDPR or a law like it applies, we rely on these bases:
- Performing our contract with you — your account, your coupons and redemptions, your designs, images and conversations, and the subscription.
- Our legitimate interests — keeping Coupam running, finding failures, and stopping abuse and automated sign-ups. We limit this to the server logs and the bot check.
- A legal obligation — payment records and anything else the law requires us to keep.
4. Who else processes it
Coupam runs on Cloudflare: the servers, the storage that holds your account, your coupons, designs and images, the model, the browser that renders your designs, the email we send, and the bot check are all Cloudflare services on our own account. No message or image of yours goes to any other AI provider. The model is GLM-5.3 Flash, an open-weight model that runs on Cloudflare Workers AI; it writes and reviews your designs. The assistant sends it nothing until you allow that, on the web or in the app, when it asks before your first message; you can turn it off in Settings (under Account in the phone app), and the assistant then asks again before your next message. Cloudflare’s Browser Run opens each design in a browser to check it, reading its QR code and barcode back the way a scanner does, and to make the files you download; Cloudflare Images reads the size of each image you upload. The typefaces your designs are set in are copied from Google Fonts into our own storage, with no personal data, and a design loads nothing from outside when it is rendered. Some email may be sent through Resend instead. Stripe takes payment on the web and keeps the card; Apple and Google take payment in the app, and each tells us when a subscription you bought there renews, is cancelled or is refunded. When the app opens, it asks Expo’s update service whether a newer version of our code is available; that request carries the operating system, our project id and a random identifier the app created for itself — no account and no device identifier — and Expo sees the IP address it came from. These providers process data only on our instruction and are each bound to protect it at least as well as this policy does; we give notice here before a new one starts.
Signing in with Apple or Google sends us your identifier and email from that provider. Each acts on its own behalf there, not as our processor, and its handling of your account with it is governed by its own privacy policy; if you hide your email from us with Apple, mail reaches you through Apple’s relay. The App Store and Google Play are the sellers of what you buy inside the app, and their handling of your payment is governed by theirs.
5. Where it is
Your data is processed on Cloudflare’s network, which spans the world, and stored on it under Cloudflare’s own commitments for international transfers. Premsan is in Japan, a country the European Commission recognises as protecting personal data adequately.
6. On the phone
The app keeps on your device a sign-in token, the language and appearance you chose, the random identifier its update check uses, and, when you share a design, a copy of that file in the app’s own cache for the share sheet. Scanning a code opens the operating system’s own scanner: on an iPhone or iPad the app asks for the camera the first time you scan, and on Android the scanner needs no permission. The scanner reads the code on your device; no picture of the camera leaves it. You can turn camera access off in the operating system’s settings and type codes instead. The app also uses the camera when you choose to take a photo for a design, with the same permission. It reads your photos and files only when you pick them, for a design or a Help message, through the system’s own picker, which needs no permission. It asks for no other permission, carries no advertising or analytics library, and purchases go through the store’s own sheet.
7. Cookies
On the web we set the cookies the product cannot work without: the one that keeps you signed in, and the ones Cloudflare Turnstile sets to tell a person from a bot on the sign-in and sign-up pages. This website and the web app keep your theme and language in your browser’s own storage. That is the whole list: no advertising cookies, no cross-site trackers, and no analytics that follows you between sites. Clearing them signs you out.
8. How long we keep it, and deleting it
We keep your account and everything in it for as long as the account exists. Undoing a redemption deletes it. Deleting a coupon deletes its codes, its redemptions and its design, with the design’s versions, renders and conversation; the images it used stay in your library until you delete them. Clearing a design’s conversation deletes the messages in it.
You can delete your account at any time: on the web under Account in Settings, or in the app under Account. We then erase everything we hold for you — every coupon, code and redemption, design, conversation and image, Help message, usage and the subscription’s state — and then the account itself, and a subscription bought on the web ends. This cannot be undone.
These records remain after the account is deleted:
- A purchase made in the app. We keep the store’s transaction id, the date and the id of the account it was bought for, so that a store sending the same receipt again cannot credit it to another account, and because the law requires payment records to be kept. The account it names no longer exists.
- Payment providers’ records. Stripe, Apple and Google keep their own records of a payment under their own legal obligations.
- Backups. Cloudflare keeps restorable copies of our databases for up to 30 days so that they can be restored after a failure; they then expire.
- Server logs. They are deleted automatically after a short time.
9. Your rights
You can read your coupons, codes, redemptions and designs in the web app or the phone app, download each code as an image, a coupon’s codes as a CSV file and its design as an image or a PDF, delete any coupon, and delete your account, without asking us. Depending on where you live, you may also have the right to a copy of the rest of what we hold about you, to restrict how we process it, to object to processing we base on legitimate interests, and to move your data elsewhere. Write to [email protected] and we will answer within one month.
If you live in California or another U.S. state with a similar law, you have the right to know what personal data we hold about you, to delete it, and to correct it; the controls above do that. We do not sell or share personal data as those laws define the words, so there is no opt-out to offer, and exercising a right gets you the same service on the same terms.
If you think we have handled your personal data wrongly, you can complain to a data protection authority — in the EEA or the United Kingdom, the one where you live or work or where the problem happened; in Japan, the Personal Information Protection Commission. You may contact us first, but you do not have to.
10. Security
Every connection is encrypted in transit. Passwords are stored as hashes. Each account is kept in its own isolated storage and is deleted with the account, apart from the records listed in section 8. The app keeps its sign-in token in the operating system’s secure store. Credentials never enter our server logs. If you find a security weakness, write to [email protected] and allow us time to fix it before you disclose it to anyone else.
11. Children
Coupam is not for anyone under 16, and we do not knowingly hold a child’s data. If you think a child has an account, tell us and we will delete it.
12. Changes
We may update this policy. When a change matters we will say so in the web app or the phone app, or by email. The date at the top is the version that stands.
13. Contact
Premsan Inc — 530-0001, 12-12, Osaka Ekimae Dai-2 Bldg., 1-2-2 Umeda, Kita-ku, Osaka-shi, Osaka, Japan. [email protected].