Effective date: October 2026
This note explains what the mobile apps from JO FERNS LTD do with information, and what they refuse to collect. It covers attribution, push notifications, the in-app assistant, and the way a letter reaches the developer. It is meant to be read, not skimmed for a checkbox. If a later version of an app changes any of this, the change is described on this page and the effective date moves with it.
The apps are built for iOS and Android from one plan. The limits below apply to both. A setting that lives on the phone, such as type size or a notification permission you already granted or refused, is about how the app behaves for you. It is not the start of a profile.
Singular
Attribution answers a narrow question: which introduction led to an install. For that measurement the apps use Singular. Singular receives the unique id described below, together with the coarse facts an attribution service needs — that an install happened, and which campaign link was involved when there was one.
Singular is not given a name, an email address, a phone number, a contact list, or a precise location. The apps do not collect those things in order to describe a person, so there is nothing of that kind to forward. Singular does not receive the text someone types to the assistant. It does not receive a message one user hoped to send another, because the apps have no such feature. Attribution is a record of an install path, not a mailbox and not a social graph.
OneSignal
Push notifications are delivered with OneSignal. A notification is a short alert from the app to a device that opted in. OneSignal uses the same unique id to address that device. The content of a push is about the app itself. It is not a note composed by one person for another person.
If you decline notification permission, the app still runs. There is simply no push. You can change that permission later in the system settings of the phone. OneSignal does not become a store for a personal profile, and it is not a route by which users trade data. A push token, where the operating system issues one, exists so a notification can arrive. It is not your name, and we do not stitch it to a biography.
The assistant
Some apps include an assistant that can talk with the person using them. The assistant is software. It is not a human, it is not a member of this studio sitting in a chat window, and it is not professional advice. It will not act as a lawyer, a clinician, an accountant, or any other licensed adviser. Treat a reply as a reply about the app, not as a verdict on your life.
What a person writes is used only to produce a reply to that person. The message is not passed to other users. It is not added to a profile of who they are. It is not sent to Singular or OneSignal as if it were attribution data or a notification. If you want a person at the studio, write to the email at the end of this page. The assistant cannot take that letter, and it should not be asked to.
No exchange between users
The apps are not a social channel. There is no feature for sending personal data from one user to another: no shared inbox, no contact discovery, no transfer of a name, a number, or a precise place. What you enter stays in the service of your own session. Other people who use the app do not receive it.
That limit is structural. We do not keep a quiet back door for “just this once” sharing. If a future version ever needed a different shape, this page would have to say so first, in plain words, with a new date. Until then, user-to-user data exchange is not part of the product.
No personal profile
The apps do not build a personal profile. They do not ask you to register with a name. They do not collect an email address or a phone number as an account. They do not read the contacts on the device. They do not take precise location. We do not assemble those pieces somewhere else under a quieter label.
Preferences that change how a screen behaves — larger type, a refused notification, a last-opened view — are about the session and the device. They are not a portrait. We do not enrich them with data bought from elsewhere, and we do not ask the assistant’s transcript to stand in for an identity.
The unique id
The only identifying item is a unique id. It exists so Singular can attribute an install and so OneSignal can address a push. It is a technical handle, generated for that purpose. It is not your name, and it is not a key to a profile.
We do not attach the assistant’s messages to that id in order to describe you to other users. There are no other users on the far side of it. If the id is rotated or replaced by the app, the new value has the same narrow job. It does not accumulate a history of who you are.
Emails to the developer
If you write to us, you choose what to put in the letter. Mail from this website opens in your own email app and is delivered to the developer, JO FERNS LTD, at the address on the contact page. That letter is ordinary correspondence. It is not mixed into the app, it is not sent to Singular or OneSignal, and it is not shared with people who use the apps.
We use the letter to answer you and to keep a record of the conversation we are actually having. You can ask us to delete that correspondence. Write from the same address, say what you want removed, and we will confirm when it is done. Do not put secrets you would not put in any other email; the path is your mail app, not a private vault on this site.
Changes
When this note changes, the new text replaces the old on this page and the effective date at the top is updated. We will not bury a material change inside a screen of the app and leave this page stale. The date of this version is October 2026. If you keep using the apps after a change is published here, the published note is the current account of how information moves.
A change that widened collection — a name, a precise place, a channel between users — would be a different product from the one described here. It would be written as such, not folded into a sentence about “improvements.”
Contact
Questions about this note go to the developer, not to a platform store and not to the assistant. Write to JO FERNS LTD at [email protected]. Say which app you mean, if you know, and what you want to understand or correct. We will reply to the address you wrote from. The terms page states the same limits in the language of use, availability, and disputes.