Comparison

UDCast vs Sullivan+

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

UDCast

This application converts spoken words into on-screen captions and sign language interpretation. It also offers voice guidance through earphones, enhancing accessibility for users.

Highlights
  • Vocal recognition
  • On-screen captions
  • Sign language interpretation
  • Voice guidance output
  • Internet-based data download
  • Device testing function
Features
Read full description

The UDCast app recognizes vocal information received through your device’s microphone, and displays captions and sign-language interpretation on your device’s screen. It can also output voice guidance through your device’s earphones. Before using UDCast for the first time… (1) At the top UDCast screen, select Test. Then go to the reception area to confirm that your device is working properly. (2) Before using, you must connect to the Internet and download the desired assistance data (voice guide, captions, and/or sign-language help). For detailed help, see the Usage Guide.

About

Sullivan+

This visual assistance app uses AI and your smartphone camera to describe surroundings, read text, identify faces, and find objects. It offers features like currency recognition and color identification to enhance accessibility for the blind and visually impaired.

Highlights
  • AI object and scene description
  • Text recognition and reading
  • Face recognition with age/gender
  • Object finder with voice guidance
  • Currency denomination announcement
  • Color recognition
Features
Read full description

Sullivan Plus is a visual assistance app provided by TUAT for information accessibility for the blind and low vision, and provides information recognized through the smartphone camera to users who need visual assistance. Sullivan Plus X SKtelecom Please support the warm collaboration between Sullivan Plus and SKtelecom! Experience Sullivan Plus with SKtelecom's diverse and powerful AI technologies! ■ AI Facecan that recognizes age, gender, and facial expressions Register your face The face registration function has been added to the face recognition mode. You can register the face of anyone you want, and find the face of the person you registered in a photo. Object Finder The object-finding feature has been added. Select the object you want to find from the list and scan your surroundings. The app will notify you with vibrations and voice prompts. PDF Quota Donation Donate your unused PDF Reader quota to help others who need it. By donating, users who have exhausted their PDF quota for the day will be able to read additional image-based PDF files based on the donated amount. If you’ve already used up your quota for the day, you can request donations. Other users can see your donation request message and choose to participate. :) Currency Recognition Sullivan Plus announces the denomination of bills via voice. (Supported currencies: Korean Won, US Dollar, Euro, Japanese Yen) Q&A Board The Q&A Board has been added for users who couldn’t resolve questions or share tips due to the lack of a communication space. If someone comments on your post, you’ll receive a notification so you can check it instantly! [Key Features] 1. AI Mode 2. Automatic Image Description 3. Text Recognition 4. Face Recognition ■ Curious about your surroundings? AI Mode - Identifies objects around you and generates descriptive sentences for the scene. ■ Struggling to read letters on mail, magazines, or newspapers? Text Recognition - Detects text and announces it audibly. Point your camera at the area with the text you want to recognize. ■ Wondering about someone you just met? Face Recognition - Identifies the person captured on camera and provides their age and gender. ■ Automatically recognize your surroundings. Automatic Image Description - No need to press the shutter button. The app automatically detects the environment and provides voice guidance. ■ Looking for the location of objects around you? Object Finder - Select the object you’re looking for, and the app will guide you to its location using voice prompts. ■ Having trouble finding the right color for your outfit in the morning? Color Recognition - Supports single-color mode to identify the color at the center of the screen and full-screen mode to identify dominant colors across the entire view. ■ Manage Samsung Electronics home appliances more smartly! Consumer Electronics Mode - Connect the QR code of Samsung Electronics home appliances to the SmartThings app to easily control products, check their status, access manuals, and request services. ■ Assisting those with low vision, not just total blindness. Magnifier - The camera's zoom function lets you enlarge or reduce objects or text and supports color inversion. [Permissions Required] The camera is used to capture images so the app can describe objects, text, and surroundings aloud for users who are blind or have low vision. Camera - Controls the camera and captures photos using the camera API. Storage - Temporarily stores captured images and deletes them after the analysis is complete. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

UDCast4 screens
Sullivan+4 screens

Verdict

The call

The clearest difference is review sentiment: Sullivan+ at 86% against UDCast's 41%. UDCast's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 17.6). On price, update cadence, ads and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sullivan+ sells 3 in-app purchases, starting at $9.99 per month. UDCast asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 29, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
UDCast versus Sullivan+: the parameters behind the verdict, then further details
ParameterUDCastSullivan+
PriceFreeFree
Rating—4.4 (22 ratings) — better
Positive reviews40.7% of reviews85.7% of reviews — better
Number of ratings—22 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.6
Further details — not scored
Size13 MB136 MB
Age rating4+4+
DeveloperPalabra Inc.TUAT Inc.

Customer experience

UDCast

Written reviews27 reviews
Positive40.7%
Neutral7.4%
Negative51.9%

Sullivan+

All ratings22 ratings
Positive77.3%
Neutral18.2%
Negative4.5%
Written reviews35 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

In-app purchases

None

UDCast

No in-app purchases

3 purchases

Sullivan+

Subscriptions1
  • Pro$9.991 Month
One-time2
  • Pro Usage 5,000 Top-Up$2.99
  • Pro Usage 15,000 Top-Up$6.99

Questions

Is UDCast free?
UDCast is free to download, with no in-app purchases.
Is Sullivan+ free?
Sullivan+ is free to download, with in-app purchases available.
Do UDCast or Sullivan+ have ads?
Neither UDCast nor Sullivan+ shows ads.
Which is updated more often, UDCast or Sullivan+?
UDCast ships an update every 2 months, and Sullivan+ every 2 months. Most recently, UDCast was updated on September 29, 2026 and Sullivan+ on October 12, 2026.

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