Calculator∫ vs Dùn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator∫
Perform calculations quickly and accurately with large buttons. Personalize the interface by selecting custom background and text colors. This straightforward utility is designed for intuitive use.
- Large buttons for easy input
- Accurate calculations
- Customizable background colors
- Customizable text colors
- Intuitive user interface
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This simple calculator app is designed for ease of use. Quickly and accurately perform calculations with the large buttons. Personalize the calculator by choosing your own colors for the background and text.
Dùn
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A private space for personal links. Dùn gives you a separate place to save links you don't want mixed with your browser history, Safari suggestions, or shared devices. Face ID protected. Local storage. No accounts. FEATURES - Save from Safari or any app via Share Sheet - Organize with simple tags - Search instantly - Face ID/Touch ID lock - Optional date tracking (for renewals, timestamps, etc.) - Encrypted backup and restore PRIVACY BY DESIGN - All data stored locally on your device - No cloud sync - No tracking or analytics of your links - No accounts required DÙN UNLIMITED Dùn Unlimited is a yearly auto-renewing subscription that unlocks saving links, in the app and from the Share Sheet. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings › Apple Account › Subscriptions. Some things don't belong everywhere. Dùn keeps them separate, private, and easy to find when you need them. Terms of Use: https://trydun.app/#terms-of-service Privacy Policy: https://trydun.app/#privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: Calculator∫ at none against Dùn's 1. Calculator∫ also leads on update cadence (weekly vs every 3 months) and device support (3 vs 1). On price and ads 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. Dùn sells 1 in-app purchase, starting at $9.99 per year. Calculator∫ asks for nothing beyond the download.
Calculator∫ ships an update weekly, Dùn every 3 months. Both last shipped on October 15, 2026.
| Parameter | Calculator∫ | Dùn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (7 ratings) — better | — |
| Positive reviews | 83.8% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Weekly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 4.3 — better | 18.6 |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | 7th Gear | Rafael Schmitt |
In-app purchases
Calculator∫
No in-app purchases
Dùn
- Dun Unlimited$9.991 Year
