Opsino: Color Identifier
Help for color blindness
Only for iPhone
Free · In‑App Purchases
iPhone
Opsino is now ready for iPhone Duo.
What color is that? Opsino helps you put a name to everyday colors using your iPhone camera or a photo. A practical aid for color blindness, including difficulty telling red and green apart.
Photo Mode and Resistor Mode are each available as a one-time in-app purchase.
IDENTIFY COLORS WITH YOUR CAMERA
Aim the measurement circle at a fairly even surface and tap to measure. Opsino displays a color name and guidance about the result. You can adjust the size of the circle. No calibration is needed for everyday measurements.
EXPLORE COLORS IN PHOTOS
Choose a photo and tap the area you want to identify. Zoom and pan to take a closer look at small details. Your original photo stays unchanged.
RESISTOR MODE
Identify color bands in photos of resistors with four, five or six bands to determine their nominal value and tolerance. Review and correct the results when needed. Save the photo and result directly on your device. The color code indicates the nominal value; it does not measure the actual electrical resistance.
UNDERSTAND YOUR RESULTS
Alongside basic colors, Opsino can identify more specific shades in suitable images, such as mint green, dark blue or lavender. Clear guidance explains when mixed colors, shadows or strong brightness differences may affect recognition.
READ RESULTS OR HEAR THEM WITH VOICEOVER
VoiceOver can read results and guidance aloud. Text, symbols and haptic feedback help you use the app without having to distinguish warning colors.
ANALYSIS ON YOUR IPHONE
Color analysis takes place directly on your device, with no account or image upload for analysis. Camera images and photos stored on your device can be analyzed offline. In photo mode, Opsino only receives access to the photo you choose. A picture stored only in iCloud may need to be downloaded first.
A color name is an estimate. Lighting, reflections and camera settings can affect the result. Photo mode identifies the color stored in the image; filters and lighting may have changed it from the original object's color. Opsino does not replace a calibrated color measurement instrument.
Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Opsino is now free with optional in-app purchases. Existing purchasers keep all features without ads.
The developer, Tobias Kollmar, 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 Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tobias Kollmar
- Size
- 12.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later.
- iPhone
- Languages
English and 17 more
- English, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Ukrainian
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Resistor Mode $2.99
- Photo Mode $1.99
- Copyright
- © 2026 AppsByMow
