TACHS Prep privacy policy

Last updated: September 23, 2026

TACHS Prep: Practice Tests is made by Simple Tree LLC. It is a study app for the Test for Admission into Catholic High Schools, which eighth graders take, which means the people using it are children. We built it so that we never learn anything about them. The short version: we collect nothing. The App Store privacy label for this app reads Data Not Collected, and the Google Play Data safety section reads no data collected and none shared, because both are literally true.

This policy covers both builds of the app — the iPhone and iPad version on the App Store, and the Android version on Google Play. They behave the same way; where a platform does something differently, such as how your work is backed up or how a purchase is handled, that difference is spelled out below.

The short version

• No account, no sign-up, no login, no email address. We don't know who you are, and there is nothing to sign in to.
• There is no analytics, no crash reporter, no advertising library and no tracking of any kind. The app has no code that sends anything to us, and we run no server that could receive it. On Android, Google's billing library brings network access of its own; that is explained in full below.
• Your answers, your study plan, your error journal and your scratch work are stored on your device. On iPhone and iPad, if you are signed in to iCloud, most of that also syncs to your own private iCloud account; on Android, it may be included in your own Google backup. We cannot read either one.
• No ads. No advertising identifier. Nothing you do is profiled, scored, or sold.
• The app has two ways to send something out of itself, and your child controls both: the progress report, which they choose to share, and on Android a progress file they can choose to export. Both are described in full below.

No accounts

TACHS Prep has no sign-up and no login. You never give us a name, an email address, a phone number, or a password, and there is no profile on our end that anything could be attached to. When you open the app for the first time it asks one thing — roughly when your test is — so it can pace a study plan. The answer lives on your device. It is not sent to us.

The app does not talk to us

This is the part most privacy policies cannot say plainly, so we will: the app contains no networking code of our own. It makes no web requests to us or to anyone else. There is no analytics SDK, no crash reporter, no advertising library and no "anonymous usage statistics". The maths renderer is open-source and network-free on both platforms — SwiftMath on iPhone and iPad, JLaTeXMath on Android.

One honest exception, on Android only. Selling the pass on Android requires Google's Play Billing library, and there is no version of it that does not pull in Google's own telemetry transport. That transport is why the installed Android app carries the INTERNET and ACCESS_NETWORK_STATE permissions: they are contributed by Google's code, not ours, and we cannot remove them and still sell anything. What travels over them is Google reporting its own billing library's usage to Google, on the same footing as the payment itself. None of your answers, your working or your progress is part of it — the app cannot send that data, because nothing in our code can. On iPhone and iPad the equivalent work is done by StoreKit, which is part of iOS itself.

The practical consequence is worth stating: even if we wanted to know how many questions you got wrong, or which topics you struggle with, or how long you study, we could not find out. That information never reaches us.

What does travel is your own backup, and it does not travel to us — on iPhone and iPad it is carried by Apple's frameworks into your private iCloud, and on Android by Android's own backup into your Google Account, both described next.

What is stored, and where

• On your device. Your answers, your accuracy and progress, your study plan and test date, your error journal, and the handwritten working from the scratch pad. Deleting the app removes all of it.
• On iPhone and iPad: in your own private iCloud. If you are signed in to iCloud, your answers, your study profile and your pass sync between your devices using Apple's CloudKit, in the private database attached to your Apple Account. This is the same mechanism that syncs Notes or Reminders. We are not a party to it: we cannot read that database, we cannot list who has one, and we receive no copy. The app uses no public or shared CloudKit database. If you would rather it did not sync at all, turn iCloud off for TACHS Prep in iOS Settings and everything stays local.
• On Android: in your own Google backup. If you have Android's backup turned on, the app's data may be copied into the backup attached to your own Google Account, in the same way as any other app on the device, and put back when you set up a new phone. That is a service between you and Google; we are not a party to it, we cannot read it, and we receive no copy. There is no live sync between two Android devices. If you would rather the backup did not happen, turn backup off for TACHS Prep in Android Settings and everything stays local.
• The scratch pad stays on the device it was written on. Handwritten working is deliberately not synced — it is bulky, it is per-device, and the pad only appears where there is room for it beside the question, which in practice means a tablet. It is written into the app's own storage, and on Android it is also left out of the Google backup. (A direct phone-to-phone transfer when you set up a new Android device may copy it along with the rest of the app's data.)
• Nowhere else. There is no third destination.

What your child can choose to send

We would rather name these plainly than let you discover them.

A name, if you want the app to use one

There is one optional text field in the app: "What should the app call you?". It is not part of setting the app up, nothing requires it, and leaving it empty simply means the app says "Good morning" instead of using a name. If you do fill it in, that name is kept on the device, and in your own private iCloud or Google backup, alongside everything else, so it can appear in the greeting and at the top of the progress report. It is not sent to us, and the app says so on the same screen as the field.

The progress report

Your child can turn their recent practice into a one-page PDF and send it to you — that is the whole point of it. The report is assembled and rendered on the device; nothing is uploaded to produce it, and no copy comes to us. It is then handed to the device's standard share sheet, on iOS or Android,, and from that moment it goes wherever your child sends it, exactly like any other file they share. There is no automatic parent email, no server-side report, and no address for us to send one to even if we wanted to.

A progress file, on Android

Android has no live sync between devices, so the Android app can export your child's progress as a single file (Export progress file, on the "About you" screen) and import it on another device. The file is written only where your child chooses to save it, and it goes nowhere else unless they send it themselves. It holds the practice record the app keeps — answers, lessons read, tests taken, and the optional name — and nothing is uploaded to produce it. The pass is never taken from an imported file: only Google Play confirms a purchase.

Permissions we never ask for

The app asks you for no permissions at all. It has no camera, microphone, photo library, contacts, calendar, health, Bluetooth or location access, and it cannot acquire them silently — both iOS and Android require an app to declare each one in advance, and TACHS Prep declares none of them on either platform. If your phone or tablet ever shows you a permission prompt attributed to this app, something is wrong and we would like to hear about it.

To be exact rather than merely reassuring: the Android build does declare three install-time permissions, and you can see them on the Play listing. One is billing, so the pass can be sold. The other two — network access and network state — arrive with Google's billing library, as described above. Install-time permissions of this kind never prompt you and grant no access to anything personal on your device. The iPhone and iPad build declares nothing at all.

Purchases

TACHS Prep is free to use, with a paid pass that unlocks the full question bank, the lesson library and the full-length practice tests for a year. It is a single payment with no auto-renewal — it lasts 365 days, nothing recurs, there is nothing to cancel, and there are no reminder emails, because we have no address to send them to.

The purchase is handled entirely by the store you bought it from — Apple on iPhone and iPad, Google Play on Android. We never see your card, your billing address, or your Apple or Google Account. The store tells the app one thing: whether a valid purchase exists. Restoring a purchase asks the same question again. Refunds are the store's process: reportaproblem.apple.com for Apple, and Google Play's refund process for Android.

One wrinkle worth naming: Google Play files a one-off prepaid purchase under Subscriptions, so that is where you will find it listed. It still does not renew, there is nothing to cancel, and you will not be charged a second time.

No ads, no tracking

There is no advertising in TACHS Prep and there will not be. The app uses no advertising identifier on either platform — not Apple's IDFA, not the Android Advertising ID — and participates in no tracking network. On iPhone and iPad it will never show you the App Tracking Transparency prompt, because it has nothing to ask permission for; its privacy manifest declares no tracking, no tracking domains and no data collected, and the single required-reason API it uses is the ordinary one for reading and writing the app's own settings, in its own storage. On Android, the Google Play Data safety section reports no data collected and no data shared, for the same reason.

Children

This app is written for eighth graders preparing for a test they sit once, in November, so we assume children use it. That is exactly why it is built the way it is: we collect no personal information from anyone, and that includes children. There is no account to create, nothing a child is required to type, no way for a child to publish anything, and no way for a stranger to contact them through the app. There is nothing for a parent to opt out of, because there is nothing being gathered.

The app is rated 4+ on the App Store and for all ages on Google Play, and contains no advertising, no in-app browser, no links out of the study material, and no user-to-user contact of any kind. The only things that can leave the app are the progress report and, on Android, the progress file, and only when your child sends them.

What we don't do

• We don't sell your data. We don't have your data to sell.
• We don't share anything with advertisers, data brokers, or analytics companies.
• We don't build a profile of you, your school, your scores, or your weaknesses.
• We don't email you, because we never learn your address.
• We don't use your work to train anything.

Your choices

• Stop the sync: on iPhone or iPad, turn off iCloud for TACHS Prep in iOS Settings; on Android, turn off backup for TACHS Prep in Android Settings. Your work stays on the device.
• Remove the name: clear the name field. The app goes back to a plain greeting.
• Delete everything: delete the app. To also remove the synced copy, use Settings › your name › iCloud › Manage Account Storage on iPhone or iPad, or your Google Account's backup settings on Android. An exported progress file is a file like any other: delete it wherever it was saved.
• Ask us anything: see Contact, below. You do not need an account to ask, and we will not ask who you are.

Changes to this policy

If the app ever changes in a way that affects this page — and we have no plans for it to — we will update this page and change the date at the top before that version ships. We will not quietly broaden it. If a future version ever collected anything at all, it would be described here in the same plain language, and the store disclosures would change to match — Apple's privacy label on the App Store listing, and the Data safety section on the Google Play listing.

Contact

Questions about this policy, or about anything the app does, can go through the support page. A person reads every message, and you do not need an account to send one — we will not ask who you are.

Simple Tree LLC

This policy describes what TACHS Prep actually does, written in plain English on purpose. It is not legal advice. TACHS Prep is not affiliated with, or endorsed by, Riverside Insights or any diocese or school.