What Day?? vs Penlight.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
What Day??
Read full descriptionHide full description
Features: Check the day of the week for any date from 1800 to 2300. Easy and fun to use. Great for planning birthdays, events, and more. Download now and always know your days!
Penlight.
This app provides a digital penlight with adjustable brightness and a built-in ruler for quick measurements. It also features color inversion for different examination needs and easy calibration using a credit card.
- Adjustable digital penlight brightness
- Credit card calibration for accuracy
- Color inversion for light/dark modes
- Metric and imperial ruler
- Educational examination tool
Read full descriptionHide full description
Key Features: - Digital Penlight: Adjustable brightness slider for precise illumination - Easy Calibration: Quickly calibrate with a credit card to for accurate measurements - Color Inversion: Easily switch between light and dark modes for different examination needs - Ruler: Metric and imperial ruler for quick measurements Disclaimer: This app is intended for educational purposes only. It is not to be used for the diagnosis or treatment of any medical condition.
Screenshots
Verdict
The clearest difference is price: Penlight. at $1.99 against What Day??'s $9.99. Penlight. also leads on update cadence (daily vs every 5 weeks). What Day??'s advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
What Day?? costs $9.99 and Penlight. $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
What Day?? ships an update every 5 weeks, Penlight. daily. The most recent releases landed on October 7, 2026 and September 14, 2026 respectively.
| Parameter | What Day?? | Penlight. |
|---|---|---|
| Price | $9.99 | $1.99 — better |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Pieter Yoshua Natanael | My Call Bag LLC |
In-app purchases
What Day??
No in-app purchases
Penlight.
No in-app purchases
Questions
Is What Day?? free?
Is Penlight. free?
Do What Day?? or Penlight. have ads?
Which is updated more often, What Day?? or Penlight.?
Other comparisons
