Calc Bookmark vs Air Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calc Bookmark
This app disguises itself as a calculator to secretly store your website bookmarks. It uses a calculator interface for both its icon and startup, making it difficult for others to discover your hidden links.
- Calculator disguise
- Hidden bookmark storage
- Password protection
- Browser share integration
- Secure website access
Read full descriptionHide full description
【Looks like a calculator! Inside is a bookmark】 This application allows you to create hidden bookmarks on your calculator for websites you do not want others to know about! The icon, name, and startup screen are the calculator itself, so it is hard for people to know that it is a bookmark application. 【Use】 1 Set a password when you start the application for the first time. Never forget your password! Do not enter a password that starts with 0. Example: 0000, 012, 0801 2 Enter the password using the calculator keys, and tap the “=” key. 3 You can open the secret bookmark. 【Add bookmarks】 •Press the "+" button that appears when you open a bookmark. •Select this application from the browser's share button. ※We are not responsible for any problems that occur at bookmarked sites.
Air Ruler
Read full descriptionHide full description
Turn your iPhone into a real, precision ruler. No need for a physical ruler — your screen becomes a true mm/cm scale. Screen Ruler Mode Place your phone next to any object. The screen displays a real millimeter and centimeter scale. Perfect for: Small objects, parts, jewelry Paper, photos, cards Screen bezels, phone cases, printed materials Anything that requires a direct, physical scale Why Air Ruler? No physical ruler needed — your phone is all you need Pure screen ruler mode, no AR complexity Clean, simple, open-and-use interface Supports cm / inch switch Use Cases DIY & crafts: materials, fabric, model parts Office & study: book dimensions, on-screen image sizes Home & daily use: check length/width of small items Quick estimation: need to know how long something is? Just use your phone Air Ruler. Measure anywhere. — Privacy Policy please visit: https://docs.qq.com/doc/DREt1SXJkbG9JYUFT * **Terms of use (EULA): * https://docs.qq.com/doc/DREdKR2ZwYUJaa1hr * **Terms of apple please visit: * https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Calc Bookmark at Free against Air Ruler's $0.99. Calc Bookmark also leads on in-app purchases (none vs 3). Air Ruler's advantage is ads (none vs shown). On 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
Calc Bookmark is free to download; Air Ruler costs $0.99 up front. Air Ruler sells 3 in-app purchases, starting at $2.99 per month. Calc Bookmark asks for nothing beyond the download.
| Parameter | Calc Bookmark | Air Ruler |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly | — |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 7 MB |
| Age rating | 9+ | 4+ |
| Developer | Sota Takasugi | 乐祥 胡 |
In-app purchases
Calc Bookmark
No in-app purchases
Air Ruler
- Ruler Premium - 30days$2.991 Month
- Ruler premium - yearly$8.991 Year
- Ruler Premium - lifetime$29.99









