Epub Studio vs Onyx Box
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Epub Studio
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Turn your photos into a digital book for Apple Books. EPUB Studio helps you create fixed-layout photo books on iPhone and iPad. Select several photos to generate pages in one step, or start with a blank book and design each page yourself. Arrange pages, resize and move photo or text layers, choose colors, and preview the complete book before export. Your projects stay stored locally on your device. Features: • Create a book from several photos • Start with a blank book • Reorder pages and layers • Add, move, resize, and delete photo or text layers • Edit titles, page names, typography, alignment, and colors • Preview every page before export • Export a fixed-layout EPUB 3 file • Share your finished book • Open exported books in epub readers • Work on iPhone and iPad EPUB Studio suits travel journals, family albums, visual stories, photography portfolios, and personal keepsakes. No publishing knowledge is required. Focus on your photos and your story. EPUB Studio handles the book structure and export.
Onyx Box
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One box holds 3 billion photos. That's not a limit you'll ever hit; it's the point. Onyx seals each photo and video on your iPhone to its essence — a two-minute video that weighed 73 MB becomes a 33 KB atom. Same video, still yours. Tap it and it beams back, checked against its own seal. Nothing moved. Nothing deleted. No account, no sign-in, no ads, nothing used for training. One box holds 3 billion photos. That's not a limit you'll ever hit; it's the point. Onyx seals each photo and video on your iPhone to its essence — a two-minute video that weighed 73 MB becomes a 33 KB atom. Same video, still yours. Tap it and it beams back, checked against its own seal. Nothing moved. Nothing deleted. No account, no sign-in, no ads, nothing used for training. Onyx Box keeps every photo and video you love without filling up your phone. Your storage doesn't matter anymore. Drop one in and Onyx seals it on your iPhone and reduces it to its essence. A two-minute video weighs 73 MB; Onyx keeps it as a 33 KB atom. Same video. Still yours. Tap it and it beams back, checked against its own seal. Do that for all of them and one phone has room for over a million photos. Stop deleting the good ones to make room for the next ones. NOTHING MOVED. NOTHING DELETED. Your originals stay right where they are. Onyx only reads the photos you choose, and it asks first — on Apple's own permission sheet. Want everything backed up? Turn on Onyx Subspace and your saves go home on their own. Nothing leaves your phone unless you choose it. SIMPLE TO START. NO CATCH. Open it, name your box, drop a photo in. That's the whole setup. Your first 50 saves are free, and they stay free. STAMPED AS YOURS Every photo is stamped with your Signal ID the moment it lands, and the stamp travels with it. It's yours wherever it goes, and it won't open unless it still matches its seal. ONE BOX FOR A LIFETIME A box is built to hold up to 3 billion photos. A lifetime. Your kids' lifetimes. MADE FOR THE WAY YOU ALREADY LIVE Your photos and videos show up just like they always have — a grid, an album, a tap to view, a swipe to browse. Send anything through Apple's own share sheet to a friend or your socials. Bring files in from the Files app. Play your music right on your home page. WHO IT'S FOR Anyone who has ever seen "Storage Almost Full" and had to pick which memory to lose. Parents. Travelers. Anyone with a phone full of life. Your memories belong to you. No one should have to choose between keeping the moment and affording the space to hold it. Powered by Physics · Math · Human Creativity. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://onyxsafebox.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Epub Studio at none against Onyx Box's 3. Onyx Box's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support 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
Both are free to download. Onyx Box sells 3 in-app purchases, starting at $8.99 per month. Epub Studio asks for nothing beyond the download.
| Parameter | Epub Studio | Onyx Box |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcel Petersen | Tony Bell |
In-app purchases
Epub Studio
No in-app purchases
Onyx Box
- Onyx Backup Monthly$8.991 Month
- Onyx Save$0.99
- Onyx Drive$1.99









