# WeekdayWiz

> WeekdayWiz (iPhone/iPad app by Pavol Kolencin.)

- Source: https://appshunter.io/ios/app/weekdaywiz/id6771076192 (this page in markdown: same URL + `.md`)
- Developer: [Pavol Kolencin](https://appshunter.io/developer/1309786113)
- Category: Education, Games
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 22 MB
- Languages: American English
- Released: 2026-05-27
- Data updated: 2026-06-03
- User reviews in markdown: https://appshunter.io/ios/app/weekdaywiz/id6771076192/reviews.md

## What is WeekdayWiz?

WeekdayWiz turns a party trick into a real skill.

  Want to know what day of the week your birthday falls on in 2034? Or whether 14 July 1789 was a Tuesday? Most people reach for a calendar app. With WeekdayWiz, you train your brain to do it in your head — in under 3 seconds.

  The method is a 9-step mental calculation tuned for dates between 1900 and 2099. Sounds intimidating? It isn't. You can master it in about a week of focused practice.

  — BUILT FOR LEARNING —
  
  • A guided Wizard walks you through every step on a real date, with explainers tuned to absolute beginners.
  • Practice mode reveals each step on tap, so you can hint your way through until the algorithm sticks.
  • Speedrun modes drill one skill at a time — month codes, mod 7 arithmetic, leap-year corrections — under a timer that pushes you faster.

  — TRACK YOUR MASTERY —

  • 12 distinct training modes from "Day of month mod 7" all the way to the Full Algorithm.
  • Master a mode by hitting 25 correct in a row, under the goal time (typically 3–6 seconds per answer). Progress shows as mastery badges on the home screen.
  • Personal bests, run history, achievement grid for all 12 modes.

  — REAL-TIME PACING FEEDBACK —

  A per-question alarm fires the moment you cross your time budget — so you feel yourself slipping before the answer is even given.
  
  — DESIGNED FOR DAILY PRACTICE —

  • Pull-to-refresh: a fresh random date.
  • Date picker for testing specific days (your birthday, a historical event, a future plan).
  • Light and dark themes, system-aware.
  • iCloud sync keeps your records consistent across iPhones (Pro).

  — FREE & PRO —

  The wizard, all step explainers, every method walkthrough, and practice mode stay free forever. Pro unlocks the timed training modes, the mastery system, and iCloud sync — one-time purchase, yours forever. 7-day free trial included.

  Master the calendar. Without the calendar.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| WeekdayWiz Pro | $2.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-05-27

No release notes.

## More apps by Pavol Kolencin

- [smsdobasy](https://appshunter.io/ios/app/smsdobasy/id1316255978)
- [CedarCloud](https://appshunter.io/ios/app/cedarcloud/id6502012166)

All apps by Pavol Kolencin: https://appshunter.io/developer/1309786113

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-03.*