Weekday Training Lab

Name: Weekday Training Lab
Author: Alan Works

LiveAlan Works2 apps · 9 installsEducationalFree · contains adsIn-app purchases: $1.49 - $3.29 per itemcom.weekday.traininglab

Learn weekday calculation with the Doomsday Algorithm.

Alert me ★ Watch Open in Play ↗

Total installs: 2
Installs / day: 0
Rating: —★
Released: 23 Aug 2026
Last update: 3 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

Shares data with third parties Location, App activity and 2 others
Collects data Location, App activity and 2 others
Data is encrypted in transit
No way to ask for data deletion

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

6 in 1 group

0 Sensitive2 Notable4 Routine

OtherNotable6

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

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

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

Learn to calculate weekdays for dates from 1900 to 2099 with the Doomsday Algorithm. Weekday Training Lab teaches the method in short chapters, then reinforces it with focused practice. Start with the 7-day cycle, century anchor days, year Doomsdays, monthly key dates, and leap-year adjustments. Each step builds toward solving a complete date on your own. Practice at your pace with basic sessions, daily challenges, and time attack as you progress. Review missed dates and track XP, levels, badges, goals, recent sessions, and daily activity. Core learning and practice are free. Pro is an optional one-time lifetime purchase with expanded practice ranges, advanced mistake analysis, and more detailed records. No subscription. No ads. Weekday Training Lab is designed for focused, offline-first study. Your learning records and settings are stored on your device. There is no login, online leaderboard, or social feed.

What's new

Improved ad placement, rewarded trials, and target-time course usability.

Growing in Educational

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