Twin Convert
Two-sided unit converter
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Two fields, one conversion. On iPhone Duo they sit across the fold. Unlock favorites and a 90-day chart.
Twin Convert is a two-sided converter. Change one value and the other updates immediately.
Convert currency, length, mass, volume, and temperature. On a large iPhone display the two fields sit side by side. On a smaller display they stack on one screen, with a swap control between them. On iPhone Duo the fields sit on either side of the fold when the phone is open, and stack when it is closed.
Currency uses a cached rate table and can refresh from the network. Conversion itself is free.
Unlock once for unlimited favorite pairs and a 90-day currency chart (free includes 4 favorites and a 30-day chart).
No account. No ads. Events stay on the device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
iPhone Duo. Open the phone and the two fields sit on either side of the fold. Close it and they stack on one screen.
The developer, Shalom Zohar Cohen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shalom Zohar Cohen
- Size
- 480.3 KB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock Twin Convert $6.99
- Copyright
- © 2026 PRD