STL Preview vs AirNotes □
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STL Preview
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STL Preview helps you open and inspect STL files directly on your iPhone or iPad, without needing to return to your computer just to check a 3D model. Whether you are preparing a 3D print, reviewing a design, sharing a model with someone, or quickly checking a part on the go, STL Preview gives you a simple way to see your model clearly in 3D. Open an STL file from Files, downloads, or the share sheet, then rotate, zoom, and examine it with smooth touch controls. Instead of guessing what a file contains from its name or waiting until you are back at your desktop CAD software, you can preview the model immediately. With AR mode, you can place your STL model into the real world using your device camera. This makes it easier to understand size, shape, and proportion before printing, presenting, or continuing your design work. You can also customize the model color and background color to make details easier to see. STL Preview is made for engineers, designers, makers, students, 3D printing users, and anyone who works with STL files and wants a faster, simpler way to inspect them on mobile. Open the file. View the model. Check it before you print, share, or continue.
AirNotes □
Send digital sticky notes to friends or keep them for yourself. Features include handwriting, widgets, and ephemeral messages. Enjoy a private experience with no ads or trackers.
- Handwritten notes
- Home Screen widgets
- Ephemeral messages
- Scheduled notes
- QR code sharing
- Customizable paper styles
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AirNotes is the joy of a sticky note — now on your iPhone. SEND A POST-IT TO SOMEONE YOU LOVE Write a short note — type it, or scribble it by hand — pick a friend, and flick it away with a playful tear-to-send gesture. It arrives as a notification and lands on their Home Screen widget and Lock Screen. No app to open, no endless chat thread. They can tap a heart back in a single touch. OR KEEP A NOTE FOR YOURSELF Send a memo to "Me" and it stays in AirNotes — a tidy wall of post-its you can search any time, color-code with paper styles, and even pin to your own Home Screen widget. A grocery list, a reminder, a thought to keep: jot it, and it's there. MADE WITH CARE • Real handwriting, with Apple Pencil or your finger • A sticky-note Home Screen widget (small, medium, large) • Connect with a friend by scanning a QR code — no phone number, no email • Ephemeral notes that self-destruct after reading • Scheduled notes, for a future moment • Read receipts and emoji reactions • Seven paper styles, a mood for every note PRIVATE BY DESIGN No account. No email. No ads. No third-party trackers. Your contacts stay on your device, and you can delete all your data from inside the app at any time. AirNotes Pro (optional) unlocks colors, the pen, ephemeral & scheduled notes, read receipts, sending to several people, and a custom ID — as a subscription or a one-time Lifetime purchase. Little notes — for the people you care about, and for yourself. Terms of use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: AirNotes □ at none against STL Preview's shown. On price, in-app purchases, device support 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
Both are free to download. STL Preview sells 1 one-off in-app purchase and AirNotes □ sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | STL Preview | AirNotes □ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 days | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 34 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Enes Akkus | Oh My Software |
In-app purchases
STL Preview
- Remove Ads$0.49
AirNotes □
- AirNotes Pro Monthly$1.991 Month
- AirNotes Pro Yearly$8.991 Year
- AirNotes Pro Lifetime$39.99









