OpoLua vs Penlight.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpoLua
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.
- View MBM image files
- View OPL scripts
- View AIF resources
- Listen to sound files
- Run OPL scripts and programs
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View MBM image files, OPL scripts, and AIF resources, listen to sound files, and run OPL scripts and programs from Psion and Psion-compatible computers.
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
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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: 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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OpoLua | Penlight. |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 7 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 9 MB | 1 MB |
| Age rating | 12+ | 4+ |
| Developer | Jason Morley | My Call Bag LLC |
Customer experience
OpoLua
Penlight.
In-app purchases
OpoLua
No in-app purchases
Penlight.
No in-app purchases
