# OpoLua vs Penlight.

The clearest difference is price: OpoLua at Free against Penlight.'s $1.99. OpoLua also leads on device support (4 vs 1). Penlight.'s advantage is update cadence (daily vs every 7 months). On ads, in-app purchases and iOS requirement there is nothing between them.

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

OpoLua ships an update every 7 months, Penlight. daily. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OpoLua | Penlight. |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/penlight/id6621271103/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Daily** |
| Monetization | **Free** | Paid |
| Size | 9 MB | 1 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Jason Morley](https://appshunter.io/developer/1711473431) | [My Call Bag LLC](https://appshunter.io/developer/1243282862) |

## What reviewers say

### OpoLua

[App page](https://appshunter.io/ios/app/opolua/id1604029880)

This utility allows users to view and interact with files from Psion computers, including image files, scripts, and resources. It also supports listening to sound files and running OPL scripts and programs directly on compatible devices.

**Highlights:** View MBM image files, View OPL scripts, View AIF resources, Listen to sound files, Run OPL scripts and programs

**Features:** Game Controller support

**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 OpoLua free?

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

### Is Penlight. free?

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

### Do OpoLua or Penlight. have ads?

Neither OpoLua nor Penlight. shows ads.

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

OpoLua ships an update every 7 months, and Penlight. daily. Most recently, OpoLua was updated on November 3, 2026 and Penlight. on October 30, 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.*