# Penlight. vs Authenticator App ···

The clearest difference is price: Authenticator App ··· at Free against Penlight.'s $1.99. Authenticator App ··· also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). Penlight.'s advantage is in-app purchases (none vs 2). On update cadence and ads there is nothing between them.

Authenticator App ··· is free to download; Penlight. costs $1.99 up front. Authenticator App ··· sells 2 in-app purchases, starting at $4.99 per 7 days. Penlight. asks for nothing beyond the download.

Penlight. ships an update daily, Authenticator App ··· every 3 days. The most recent releases landed on September 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Penlight. | Authenticator App ··· |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/penlight/id6621271103/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Monetization | Paid | — |
| Size | 1 MB | 59 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [My Call Bag LLC](https://appshunter.io/developer/1243282862) | [Aybat Bertan Artan](https://appshunter.io/developer/1785278325) |

## What reviewers say

### Penlight.

[App page](https://appshunter.io/ios/app/penlight/id6621271103)

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.

**Highlights:** Adjustable digital penlight brightness, Credit card calibration for accuracy, Color inversion for light/dark modes, Metric and imperial ruler, Educational examination tool

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Authenticator App ···

[App page](https://appshunter.io/ios/app/authenticator-app/id6739433273)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Week Premium | $4.99 | per 7 days |
| 1-Year Premium | $49.99 | per year |


## Frequently asked questions

### Is Penlight. free?

Penlight. costs $1.99, with no in-app purchases.

### Is Authenticator App ··· free?

Authenticator App ··· is free to download, with in-app purchases available.

### Do Penlight. or Authenticator App ··· have ads?

Neither Penlight. nor Authenticator App ··· shows ads.

### Which is updated more often, Penlight. or Authenticator App ···?

Penlight. ships an update daily, and Authenticator App ··· every 3 days. Most recently, Penlight. was updated on September 14, 2026 and Authenticator App ··· on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*