← PerKind, Inc.

Privacy Policy

Last updated: November 3, 2026

PerKind, Inc. ("PerKind", "we", "our", or "us") builds mobile applications for everyday life. This policy explains how our apps, and our website perkind.ai, handle your information.

It applies to all apps published by PerKind (some currently listed under the HolyApps name), on both the App Store and Google Play, including:

Information we collect

Short version: you never need an account, and we collect no personal identity. Our apps play fully offline; some also use the network for one specific purpose, always with only a random, anonymous identifier — never your name, email, Apple ID or Google account. Hello World Travel Kit fetches public currency rates, 40 sends the text of your spoken question to our server to generate an answer, Hello: Free NYC sends your approximate location to find nearby public places and events, KJV Bible and Catholic Bible stream their audio narration (and KJV Bible its Bible stories and reading plans), Catholic Bible fetches the daily Mass readings, and our offline card games, KJV Bible and Catholic Bible send anonymous usage statistics — to our own backend and, in some games, to Google Analytics for Firebase — that help us improve them. The card games' weekly leaderboards also show the nickname you choose and an approximate region beside it.

Our apps do not require an account, login, or any personal information to use. App data such as your bookmarks, highlights, notes, and settings is stored locally on your device. Apps that work fully offline never send this data anywhere; where an app uses an online service, exactly what it sends is described under "Network use" below.

Analytics

Apart from the ads in 大老二 and 拖拉机 (described below), our apps show no ads, and we never sell or rent your data. We collect a small amount of anonymous usage data in our offline card games — 拖拉机, 斗地主, 大老二, 台灣麻將 and 其乐掼蛋 — and in KJV Bible and Catholic Bible, to understand which features are used and to keep the games balanced. This data is sent to our own backend and, in some of these apps, also to Google Analytics for Firebase (a Google analytics service) so we can measure engagement, retention, and how well our own app-install campaigns perform. It consists of a random, per-install identifier (not linked to your name, email, Apple ID, Google account, or any account) together with basic usage events such as app opens, screen views, matches started or finished, and (in our Bible apps) chapters read or listened to, prayers and readings viewed, and reminders opened, plus general technical information Google Analytics collects automatically — such as device model, operating-system version, and coarse region or country.

Advertising ID (Android): on Android, Google Analytics for Firebase may also read your device's advertising ID, which it uses for analytics and to measure our ad campaigns. You can reset it or delete it at any time in your device's Google settings. On iOS, the advertising identifier (IDFA) is read only if you allow tracking when the app asks (App Tracking Transparency); otherwise it is never accessed.

This data contains no personal information and no chat or message content, is sent on a best-effort basis only when a connection is available (the games are fully playable offline), and is never sold. Data sent to Google is processed under Google's privacy policy.

Advertising: 大老二 and 拖拉机 show ads, including full-screen and optional reward video ads. Ads are served by third-party ad networks (currently Google AdMob), which may collect device information such as the device model, operating-system version, IP address and, where allowed, the advertising identifier, to serve, measure and personalize ads. In the EEA, the UK and Switzerland we ask for your consent first, and you can choose not to consent. Rewards from reward videos are in-game items only; they have no cash value and cannot be transferred. Data processed by an ad network is covered by that network's own privacy policy, such as Google's advertising policies.

Ad measurement (Meta): 拖拉机, 斗地主, 大老二, 台灣麻將, KJV Bible and Catholic Bible include the Meta (Facebook) SDK so we can measure how well our own app-install ads on Facebook and Instagram work. It tells Meta when the app is installed and opened and when a few in-app events happen (such as a round finished or a chapter read), together with technical information such as device model, operating-system version and, on Android, the advertising ID. On iOS, the advertising identifier (IDFA) is read only if you allow tracking when the app asks (App Tracking Transparency); otherwise it is never accessed. We do not use Facebook Login and send Meta no name, email or account details. Data sent to Meta is processed under Meta's Privacy Policy.

Install source (Android): when an app is first opened on Android we read the Google Play install referrer — a note from Google Play saying whether the install came from one of our ad campaigns — so we can see which campaign brought it.

Network use

Many of our apps work fully offline and make no network requests at all; several others use the network, each for a single, specific purpose described below.

Hello World Travel Kit fetches live currency exchange rates from a third-party rate provider (open.er-api.com). These requests retrieve public rate data only — no personal information, account, device identifier, or location is ever sent. The latest rates are cached on your device so the app keeps working offline.

40 / 40百科 is a voice knowledge app, so it needs the microphone and an online service. When you tap the microphone and speak, the app uses your device's built-in speech recognition to turn your speech into text; depending on your device and its settings, this may be processed on-device or by your platform's speech-recognition service (governed by its own privacy policy). The app does not save or upload audio recordings — only the resulting text. To answer your question, the text of that question is sent over an encrypted (HTTPS) connection to our backend at api.holyapps.io, where it is processed by our AI provider, Anthropic (Claude), and may be checked against public reference sources such as Wikipedia and Wikidata. Each installation is assigned a random, anonymous identifier that is not linked to your name, email, or any account; it is used only to keep your question history and to limit abuse. Your questions and answers are stored on your device and, under this anonymous identifier, on our backend.

Hello: Free NYC shows free things to do around you in New York City, drawn from public NYC Open Data and Wikipedia. To find what is nearby, the app sends your location coordinates (or a neighborhood you pick manually) over an encrypted (HTTPS) connection to our backend at api.holyapps.io, which returns nearby parks, events, landmarks, and facts. Requests carry no name, email, or account — only the coordinates needed to answer "what's near this spot." Your location is used to serve your request and is not used to build a profile or track you over time. When you use the in-app "Ask" feature, the text of your question is sent to our backend and answered by matching it against the same public data — it is not linked to your identity.

KJV Bible reads fully offline. When a connection is available, it streams or downloads the narrated audio for the chapter you choose, the daily Bible story video, and the reading-plan catalog from our servers (audio.holyapps.io and api.holyapps.io) over an encrypted (HTTPS) connection; these requests fetch content only and carry no name, email or account. It also sends the anonymous usage statistics described under "Analytics" — a random, per-install identifier plus events such as app opens, screens viewed, chapters read or listened to, and reminders opened — to our backend and to Google Analytics for Firebase. Your bookmarks, highlights, notes and reading progress stay on your device.

Catholic Bible reads fully offline. When a connection is available, it fetches the day's Mass readings from a public readings service (cpbjr.github.io), and streams or downloads the narrated audio for the chapter you choose from our server (audio.holyapps.io), all over an encrypted (HTTPS) connection; these requests fetch content only and carry no name, email or account. Links to saints' biographies open in your browser. It also sends the anonymous usage statistics described under "Analytics" — a random, per-install identifier plus events such as app opens, screens viewed, chapters read or listened to, prayers and readings viewed, and reminders opened — to our backend and, on some platforms, to Google Analytics for Firebase. Your bookmarks, notes and settings stay on your device.

Our offline card games (拖拉机, 斗地主, 大老二, 台灣麻將, 其乐掼蛋) are fully playable with no connection. When a connection happens to be available, they send anonymous gameplay statistics — a random, per-install identifier plus events such as app opens, screen views, and matches played — over an encrypted (HTTPS) connection to our backend at api.holyapps.io, and fetch remote game-tuning settings (such as difficulty). In some of these games, the same anonymous gameplay events are also sent to Google Analytics for Firebase, as described under "Analytics". No account, chat content, or precise location is ever sent to either destination. Scores in these games are an on-device tally with no real-world value, and nothing in them can be purchased.

Weekly leaderboards. The card games' weekly leaderboards show each player's nickname, weekly score, and an approximate region (IP屬地 / IP属地). The nickname is one you may choose yourself (otherwise a random one is assigned); it is stored on our backend with your anonymous identifier and is visible to other players. The region — a city, county, or province in some places (such as Taiwan or mainland China) and a country everywhere else — is derived on our server from the network location our hosting provider (Cloudflare) has already resolved for your connection. Your IP address itself is never stored, no more precise location is requested or kept, and the games never ask for or use your device's location services. The region label is stored with your anonymous identifier and weekly score, refreshes the next time you score, and is visible to other players on the leaderboard. It is never used for advertising and never used to track you.

其乐背单词 keeps your word lists, study progress and settings on your device only. It sends no usage statistics and has no account. When a connection is available, it downloads word-pronunciation audio from our servers (audio.holyapps.io) — the requests carry only which word or deck is being fetched, nothing about you. Without a connection, the phone's own voice reads the words instead.

Location

Our card games do not use your device's location services at all and never ask permission for them. The approximate region shown on their weekly leaderboards is worked out on our server from the network location of your connection, as described above. We do not store your IP address and do not keep a history of where you have been.

Hello: Free NYC uses your device location only while you are using the app, and only to show what is nearby and how far away it is. You can also set your area manually instead of using GPS. Location is requested with your permission through the operating system, and you can turn it off at any time in your device settings. We do not store your location history.

Notifications

Some of our apps offer optional local notifications (such as daily reminders). These notifications are scheduled and delivered entirely on your device using the operating system's built-in notification system; no push service is involved. Some apps record, as part of the anonymous gameplay statistics above, whether a reminder was opened, so we can tell whether reminders are useful.

Third-party services

Apart from the ads in 大老二 and 拖拉机 (see "Analytics"), our apps contain no ads, and they have no social login and no social-media sharing integrations. Some of our card games, KJV Bible and Catholic Bible use Google Analytics for Firebase to collect the anonymous statistics described above, and the Meta SDK to measure our own app-install ads, as described under "Analytics"; Google and Meta process this data under their own policies. Hello World Travel Kit contacts a public currency-rate API (open.er-api.com) and can open official government websites in your browser for visa information — neither receives any personal data from us. 40 relies on your platform's speech recognition, Anthropic (the AI that generates answers), and public reference sources such as Wikipedia/Wikidata; none of these receive your identity, only the data needed to perform the request. Hello: Free NYC draws on public NYC Open Data and Wikipedia through our own backend. Our backend and this website are hosted on Cloudflare.

Data storage and retention

All data generated by an app (such as your settings, bookmarks, saved preferences, cached exchange rates, and question history) is stored locally on your device. If you uninstall the app, this local data is deleted; we cannot access, recover, or restore it. 40 also stores question history, and our card games store anonymous gameplay events, nicknames, weekly scores, and leaderboard region labels, on our backend under a random anonymous identifier, as described above.

Deleting your data

To delete data held on our servers, email contact@perkind.ai with the app name and, if you can, the nickname you use in it. We will delete the gameplay events, nickname, scores, region labels, and question history associated with that installation's anonymous identifier. Because we hold no account or contact details, uninstalling the app also ends any further collection. Data already sent to Google Analytics is retained under Google's retention settings and is not linked to your identity.

This website

perkind.ai is a static website. It does not use cookies, analytics, or advertising. Our hosting provider (Cloudflare) may process standard technical information such as IP addresses to deliver and secure the site.

Children's privacy

Our apps do not knowingly collect personal information from anyone, including children under the age of 13. If you believe a child has provided us personal information, contact us and we will delete it.

Changes to this policy

We may update this policy from time to time. When we do, we will revise the "Last updated" date above.

Contact us

PerKind, Inc.
New York, NY, United States
contact@perkind.ai