Arbor Lab. App
Last updated: November 12, 2026
Arbor Lab. App ("we", "us") sets out this Privacy Policy ("this Policy") for how user information is handled in Grindcrawl ("the App"; Japanese name: グラインドクロール), a game we provide. This Policy applies only to the App. Our other apps are covered by their own privacy policies (available from our website at https://arborlab.app/en.html). If there is any difference between the Japanese and English versions, the Japanese version prevails.
| Personal information entry, account registration | None |
|---|---|
| Where game data is stored | Only on your device. It is not sent to our servers |
| When information goes to outside parties | Advertising (Google AdMob; Section 2), the bug report form (Google Forms; Section 3), contacting us by email or X (Section 3), and external pages you open by tapping a link (Section 3) |
| How to delete data | "Reset Data" in Settings, or uninstalling the App (Section 5) |
The App has no features that ask you to enter personal information such as your name or email address. No account registration is required.
Game progress (level, floor, equipment, stats, character names, settings, etc.) is stored only in an on-device database (IndexedDB) on your device. This data is not sent to our servers or any third-party servers. We do not operate any servers that receive the App's game data.
The App handles the following only on your device, and the App does not send them outside your device.
The App shows notifications about game progress (such as reaching the offline reward limit or the equipment storage limit) as local notifications created and displayed on your device. They do not pass through our servers or any third-party servers. You can change the notification permission at any time in your device's settings.
This Policy describes how version 1.6.1 and later of the App behave. From version 1.5.0 through 1.6.0, the App sent the App Store ID of Grindcrawl 2 and a fixed country code (jp) to Apple's information lookup service (itunes.apple.com) once at startup to check whether the new game was available (this includes no information that identifies you or your device; by the nature of the connection, information such as your IP address reaches Apple). Version 1.6.1 stopped this. Also, up to version 1.6.1, "Privacy Policy" in Settings opens the top page of our website (arborlab.app; arborlab.app/en.html when the App of version 1.5.0 or later is shown in English). You can open this Policy directly at https://arborlab.app/grindcrawl/privacy/en.html.
The App uses Google AdMob (an ad delivery service provided by Google LLC) to show banner ads and rewarded ads (video ads that grant an in-game bonus when watched).
AdMob may collect information such as the following to deliver, personalize, and measure ads.
For how this information is handled, see Google's Privacy Policy, Google's "Advertising" page (including how ads are personalized), and the explanation of how Google uses information for ads at https://business.safety.google/privacy/.
On iOS 14.5 and later, a dialog (App Tracking Transparency) asks whether you allow tracking across other companies' apps and websites when you first launch the App. Even if you choose "Ask App Not to Track", you can use all features of the App (gameplay and ads) as usual. If you do not allow tracking, the advertising identifier (IDFA) is not used for ads.
To determine whether consent is required in your region, the App contacts Google at startup and at other times (Google determines your region from information such as your IP address). If you use version 1.5.0 or later of the App in the European Economic Area (EEA), the UK, or Switzerland, the App asks for your consent to the use of data for ads (such as storing information on your device and personalizing ads) before showing ads. This screen is provided by Google's consent management tool (User Messaging Platform, which supports the IAB Transparency & Consent Framework) and appears before the tracking permission dialog described above. Information on how this screen is shown and used is also sent to Google to operate the consent mechanism (it is not linked to you and is not used for tracking). You can review or change (withdraw) your choices at any time from "Ad Privacy Settings" on the Settings screen. If you do not consent, ads may not be shown or may be shown without personalization. If ads are not shown, rewards for watching ads (such as the reward from the ad button on the "Welcome Back" screen) may not be available, but you can still use all other features of the App (gameplay) as usual. You can also see how Google uses data at https://business.safety.google/privacy/.
The external service described in this section (Google AdMob) provides protection of user data equal to or greater than this Policy under its own privacy policy, and we use it after confirming this.
When you tap a link in Settings or elsewhere, the App opens the pages below in an in-app browser. The App does not communicate with these pages until you tap the link. How information is handled on each page follows the privacy policy of that page's operator.
From "Privacy Policy" in Settings, you can open this Policy on our website (arborlab.app) in an in-app browser. The website runs on the servers of Lolipop! (provided by GMO Pepabo, Inc.). As with web servers in general, this server may keep a record of visits (such as IP addresses and browser types). We do not use these records. Lolipop! (the website server and email) provides protection of user data equal to or greater than this Policy under its terms of service (confidentiality) and privacy policy, and we use it after confirming this.
From "Report a Bug" under "Bug Reports & Contact" in Settings, you can open a Google Form (a service provided by Google LLC) that we have prepared, in an in-app browser. The App does not pre-fill any fields and does not pass the operating environment or any other information to the form.
What you submit (subject, bug summary, steps to reproduce, expected behavior, operating environment, etc.) is used only to investigate and fix bugs and to respond to your report. It is stored as a Google Forms response and recorded in a private development repository we manage on GitHub (provided by GitHub, Inc.). We do not publish or sell it to third parties. Google and GitHub provide protection of user data equal to or greater than this Policy under their own privacy policies, and we use them after confirming this.
We keep what you submit for as long as needed to address the bug. If you would like it deleted, please contact us at the address in Section 7. Please do not enter personal information such as your name or email address, or passwords, in the form.
"X(@ArborLabApp)" under "Bug Reports & Contact" in Settings only opens our X account page (X is a service provided by X Corp.) in an in-app browser. No draft post is pre-filled, and the App does not pass the operating environment or any other information to X. We never post or send anything automatically from the App.
What you post to @ArborLabApp from your own X account is handled under X's privacy policy and is public on X. Please do not include personal information such as your name or email address, or anything you do not want others to see (including information visible in screenshots). We use posts that reach us as mentions or replies to @ArborLabApp only to investigate and fix bugs and to respond to your report, and may record them in a private development repository we manage on GitHub (provided by GitHub, Inc.). You can delete your post at any time from your own X account (if you would like us to delete anything we have viewed or recorded, please contact us at the address in Section 7).
If you contact us by email (including "Contact by Email" under "Bug Reports & Contact" in Settings; the App only opens your email app and does not put device information or user identifiers in the email. Only our address is filled in, not a subject or message), we use your email address and what you write only to reply to you and to investigate what you report, and keep them for as long as needed to respond. We do not publish or sell them to third parties. We also record the content of bug reports (not the address you email us from) in a private development repository we manage on GitHub (provided by GitHub, Inc.). We receive email through the email service of Lolipop! (provided by GMO Pepabo, Inc.; see "Privacy Policy (this page) and our website server" in this section for how Lolipop! protects data). If you would like them deleted, please contact us at the address in Section 7.
From "New Release" in Settings and from the one-time announcement, you can open the App Store page of Grindcrawl 2 (a service provided by Apple Inc.), and from "Special Thanks" in Settings, the page of dot-illust.net, the source of some of our artwork, in an in-app browser. The App does not pass your information to these pages.
The App is not designed primarily for children under 13. We do not knowingly collect personal information from children under 13.
No game data from the App is stored on our servers. What reaches us through the bug report form, email, or X is stored as shown in the table below. Where data is stored and how to delete it:
| Data | Stored in | How to delete |
|---|---|---|
| Game progress and settings | Your device (IndexedDB) | "Reset Data" in Settings, or uninstall the App |
| Ad consent status and whether the casino payout tables are expanded | Your device (the App's small storage area, and the storage area of Google's consent management tool) | Uninstall the App ("Reset Data" does not remove them. If you are in the EEA, the UK, or Switzerland, you can change your consent in "Ad Privacy Settings" in Settings) |
| What reaches us through the bug report form, email, or X | Google Forms, our email, and our private development repository (GitHub; the address you email us from is not recorded there) | Contact us at the address in Section 7 |
| Information Google collects for ads | To stop use: iOS "Tracking" in Settings, and Google's ad settings. To delete: follow the methods described in Google's privacy policy |
This Policy may be changed without prior notice in response to changes in laws or in the App's specifications. We will announce important changes in the App or on this page.
For questions about this Policy, or to request disclosure, correction, deletion, or suspension of use of your information, please contact us at the address below (we may be unable to respond if we cannot verify that the request comes from you).
Arbor Lab. App
info@arborlab.app