# Dark30 vs Penlight.

The clearest difference is price: Dark30 at Free against Penlight.'s $1.99. Dark30 also leads on device support (3 vs 1) and iOS requirement (12.4 vs 16.0). Penlight.'s advantage is update cadence (daily vs every 6 weeks). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Dark30 is free to download; Penlight. costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Dark30 against 5.0 for Penlight.. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Dark30 ships an update every 6 weeks, Penlight. daily. The most recent releases landed on June 4, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Dark30 | Penlight. |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/dark30/id6468766392/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/penlight/id6621271103/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | **Free** | Paid |
| Size | 45 MB | 1 MB |
| Requires iOS | **12.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Sellmark Corporation](https://appshunter.io/developer/1708678948) | [My Call Bag LLC](https://appshunter.io/developer/1243282862) |

## What reviewers say

### Dark30

[App page](https://appshunter.io/ios/app/dark30/id6468766392)

Control thermal imaging devices remotely from your mobile or tablet. Stream real-time video and manage pan and tilt functions for precise adjustments.

**Highlights:** Mobile/tablet connectivity, Thermal imaging control, Real-time video streaming, Pan tilt rotation control

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Dark30 free?

Dark30 is free to download, with no in-app purchases.

### Is Penlight. free?

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

### Which has better reviews, Dark30 or Penlight.?

Dark30 and Penlight. are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Dark30 or Penlight. have ads?

Neither Dark30 nor Penlight. shows ads.

### Which is updated more often, Dark30 or Penlight.?

Dark30 ships an update every 6 weeks, and Penlight. daily. Most recently, Dark30 was updated on June 4, 2026 and Penlight. on September 14, 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.*