BD LUX vs EPUB Compressor
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
BD LUX
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BD LUX is the ultimate tool for anyone looking to measure and optimize light quality. With our app, you can easily collect spectral and photometric data and calculate light intensity, quality, and temperature. Additionally, BD LUX helps you define the light flickering index and frequency, and determine the potential risk for human eyes due to light flickering. You can also use the app to send reports to your email based on the collected data. With BD LUX, you can ensure that the lighting in your environment is always optimized for maximum health and productivity.
EPUB Compressor
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Is your ebook library eating your storage? LiteBook shrinks EPUB files instantly. 100% on-device, no sign-up, no cloud. EPUBs are often full of hidden bloat, massive unoptimized images, and unnecessary code that eats up your storage. LiteBook is a lightning-fast utility designed to do one thing perfectly: shrink your ebooks without ruining your reading experience. Publishing to Amazon KDP or Draft2Digital? LiteBook helps you hit file size limits without re-editing your manuscript. Compress before upload in seconds. Whether you are managing a massive digital library or just trying to fit a few more books onto your device, LiteBook processes everything locally. Key Features: - 100% On-Device: Your books never leave your phone. Total privacy and offline capability. - No Sign-Up, Ever: Open and compress immediately - Two Compression Modes: Balanced for daily use, Maximum for critical storage recovery - Visual Quality Protected : Strips XML bloat and junk metadata, never touches your text -Batch Processing: Optimize multiple books at once to clean up your entire library in a single tap. Reclaim your storage. No account needed, no files uploaded, no excuses. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: BD LUX at none against EPUB Compressor's 2. EPUB Compressor's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. EPUB Compressor sells 2 in-app purchases, starting at $2.99 per month. BD LUX asks for nothing beyond the download.
BD LUX ships an update every 2 months, EPUB Compressor every 3 weeks. The most recent releases landed on May 31, 2026 and September 24, 2026 respectively.
| Parameter | BD LUX | EPUB Compressor |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 weeks β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.0 β better | 15.5 |
| Further details β not scored | ||
| Size | 220 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | RafaΕ Zielinski | SAMUEL NNAEMEKA ON YE JI |
In-app purchases
BD LUX
No in-app purchases
EPUB Compressor
- monthly$2.991 Month
- yearly$19.991 Year









