DxByDy›

Name: DxByDy›
Author: Arc12Box LLC

LiveArc12Box LLC2 apps · 7 installsEducationFreecom.dxbydy.app

Master any subject's formulas with FSRS spaced repetition flashcards.

Alert me ★ Watch Open in Play ↗

Total installs: 2
Installs / day: ~0
Rating: —★
Released: 13 Sept 2026
Last update: 14 Sept 2026
Countries: —

Install history

exact counter from Google Play

30dAll

Installs per day · last 90 days

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Data safety

declared by the developer on Google Play

No data shared with third parties
No data collected
Data is encrypted in transit
You can ask for your data to be deleted

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

13 in 4 groups

6 Sensitive2 Notable5 Routine

What this app can do with your phone

Use your camera to take photos and record videos
Read photos, videos, and other files saved in your phone's shared storage
Add, change or delete photos, videos and other files in your phone's storage
Show its own windows or bubbles on top of other apps you are using

Photos/Media/FilesSensitive2

Access to photos, videos, music and other files stored on your device

Read photos, videos, and other files saved in your phone's shared storageread the contents of your USB storage · READ_EXTERNAL_STORAGE
Add, change or delete photos, videos and other files in your phone's storagemodify or delete the contents of your USB storage · WRITE_EXTERNAL_STORAGE

StorageSensitive2

Access to files, photos and media saved on your phone's storage

Read photos, videos, and other files saved in your phone's shared storageread the contents of your USB storage · READ_EXTERNAL_STORAGE
Add, change or delete photos, videos and other files in your phone's storagemodify or delete the contents of your USB storage · WRITE_EXTERNAL_STORAGE

CameraSensitive1

Access to your camera to take photos and record video

Use your camera to take photos and record videostake pictures and videos · CAMERA

OtherSensitive8

Access to miscellaneous device features that don't fit other categories

Show its own windows or bubbles on top of other apps you are usingdraw over other apps · SYSTEM_ALERT_WINDOW
Start itself automatically as soon as your phone finishes turning onrun at startup · RECEIVE_BOOT_COMPLETED
Keep your phone's processor or screen from going to sleep, which can use more batteryprevent device from sleeping · WAKE_LOCK
Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
Connect to the internet to load content and send datafull network access · INTERNET
Make your phone vibratecontrol vibration · VIBRATE
Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE
Receive push messages sent from the app's servers over the internetreceive data from Internet · com.google.android.c2dm.permission.RECEIVE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description

DxByDy turns your syllabus into a single deck of cards built around applying each formula — not just memorizing what it says. Every card shows the formula, its variables, and the specific scenario that calls for it, so recognising the right tool becomes second nature. At the core is FSRS (Free Spaced Repetition Scheduler) — a modern memory algorithm that tracks how well you know each card and schedules your next review for exactly the moment you're about to forget it. No wasted time revising things you already know cold. No formulas slipping through the cracks because you didn't circle back in time. HOW IT WORKS • Study cards built around real application scenarios, not rote definitions • FSRS adapts the schedule to your own memory, card by card • Rate each card Again / Hard / Good / Easy and let the algorithm handle timing • See what's due today, and what's coming up next • Create your own cards for any subject or formula set Covers physics, chemistry, biology and mathematics out of the box — or build your own deck for any subject that needs formula recall. Whether you're prepping for a test next week or building long-term recall for exams months away, DxByDy keeps what you're at risk of forgetting close, and what you've mastered out of the way.

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