App Intel
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FormulaBase

LiveAT Languages Master Apps29 apps · 2.4M installsEducationFreecom.johntran.formulabase

Formula reference & derivations for stats, linear algebra, calculus, ML

Alert me★ WatchOpen in Play ↗
Total installs
1
exact · Play shows 1+
Installs / day
0
since last crawl
Rating
—★
— ratings · — reviews
Released
29 Sept 2026
14d ago
Last update
12 Oct 2026
v1.21.0 · 4h ago
Countries
—
not checked yet

Install history

exact counter from Google Play
11.21.51.7210 Oct11 Oct12 Oct
11.21.51.7210 Oct11 Oct12 Oct

Installs per day · last 90 days

00.30.50.8111 Oct12 Oct12 Oct11 Oct: 012 Oct: 0

Change timeline

6 changes
  1. Update date
    10 Oct 202612 Oct 2026
  2. Version
    1.20.0 → 1.21.0
  3. What's new
    111 new Assemble questions: Probability now has 109, Statistics 73 and Linear Algebra 67 (350 in total).New home screen: formulas appear right away, with subject chips, favourites and recently viewed on top. 5 new cards on decision theory and loss functions.
  4. Update date
    9 Oct 202610 Oct 2026
  5. Version
    1.16.0 → 1.20.0
  6. What's new
    New: Gamma function (8 cards) and Distribution Relationships (16 cards) - how normal, chi-squared, gamma, exponential, t, F and beta connect. Each comes with quizzes and Vietnamese.111 new Assemble questions: Probability now has 109, Statistics 73 and Linear Algebra 67 (350 in total).

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.

Manifest analysis reads only the required APK ranges. Base APK downloads may need separate device splits to install.

Data safety

declared by the developer on Google Play
  • No data shared with third parties
  • No data collected

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

12 in 4 groups
6 Sensitive2 Notable4 Routine

What this app can do with your phone

  • Record sound using your phone's microphone
  • 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
MicrophoneSensitive1

Access to your phone's microphone to record sound

  • Record sound using your phone's microphonerecord audio · RECORD_AUDIO
OtherSensitive7

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
  • Change volume and choose which speaker or headset plays soundchange your audio settings · MODIFY_AUDIO_SETTINGS
  • 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

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

Screenshot 1 Download
Screenshot 2 Download
Screenshot 3 Download
Screenshot 4 Download
Screenshot 5 Download
Screenshot 6 Download
Screenshot 7 Download
Full description
FormulaBase is a fast, offline-first formula reference built for students of probability, statistics, linear algebra, calculus, optimization and machine learning. Every card gives you more than just the formula: • The formula itself, in clean LaTeX • What each symbol means • The intuition behind it — not just the math • When to use it, and the conditions that must hold • A step-by-step derivation, when the formula benefits from one • A common mistake students make with it • Practice questions to check you actually remember it Ask a follow-up question about any formula, or request an AI-generated explanation when a topic isn't clicking. No account, no ads, no tracking. Your progress stays on your device. Subjects covered: Probability · Statistics · Linear Algebra · Calculus · Optimization · Machine Learning

What's new

New home screen: formulas appear right away, with subject chips, favourites and recently viewed on top. 5 new cards on decision theory and loss functions.

Growing in Education

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