Sullivan+ vs Perception Assist
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- AI object and scene description
- Text recognition and reading
- Face recognition with age/gender
- Object finder with voice guidance
- Currency denomination announcement
- Color recognition
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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/
Perception Assist
This app uses AI to help blind and visually impaired users understand their surroundings. It provides voice guidance and haptic cues for outdoor risks, scene analysis, and object detection, with both on-device and cloud-assisted capabilities.
- Outdoor risk recognition
- AI scene analysis
- Automatic detection mode
- Multilingual voice feedback
- On-device and cloud processing
- Accessible interaction design
- Privacy protection
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Perception Assist (Perceive World Assist) is an environmental awareness and voice guidance assistant designed for blind, visually impaired, and low-vision users. The app combines on-device visual detection, scene understanding, spoken feedback, and haptic cues to help users understand their surroundings more quickly. Even with weak or no network connection, on-device capabilities can provide basic environmental recognition and risk prompts. When a network is available, cloud AI can provide more detailed scene and object analysis. Accessible reading Version 1.9.0 expands accessible reading. 1. Browse, search, download, and read Project Gutenberg public-domain books, with offline reopening and download progress. 2. Import DRM-free EPUB and TXT files, and open PDFs up to 200 MB. 3. Switch among original text, smart-recognized text, and translations while keeping positions, bookmarks, notes, and search aligned. 4. Follow reading keeps the active line near the center with word highlighting; Listen mode can continue when the screen is locked. 5. Translation and smart recognition continue in sections, announce progress, and resume saved translated content. 6. Adds Siri reading controls and improves long-document positioning, scrolling, VoiceOver feedback, and stability. Key Features Outdoor risk recognition Detects selected traffic signals, crosswalks, bicycles, cars, approaching vehicles, and other elements, then provides voice prompts for potential surrounding risks. AI scene analysis Uses advanced AI models to interpret people, objects, spatial layout, and visible text, making indoor and outdoor environments easier to understand. Automatic detection mode Open the app and it can start automatically, reducing complex operations and helping users enter an assisted recognition state more quickly. Multilingual voice feedback Supports multiple spoken languages, adapts to the system language or user selection, and allows speech rate adjustment. On-device first, cloud assisted Basic recognition is mainly performed on device and remains available with weak or no network connection. When online, cloud AI can provide richer scene descriptions and review results. Accessible interaction design Combines voice, vibration cues, and accessible interface elements to provide detection status, scene overview, operation guidance, and assistive feedback. Privacy protection Visual and audio data are processed on device by default. No account registration is required. Except when users actively use optional cloud-assisted analysis, the app does not store personal visual or audio data. Usage suggestion For a more stable recognition experience, use headphones, bone-conduction headphones, or a chest phone mount. Safety Notice Perception Assist (Perceive World Assist) is an accessibility aid that uses the device camera to provide environmental audio and haptic cues. It does not measure health metrics and does not provide medical advice, diagnosis, treatment, or professional navigation services. Detection results may be inaccurate or incomplete and may be affected by lighting, weather, obstacles, camera angle, device movement, or network conditions. Always rely primarily on a cane, guide dog, or other mobility aid, follow official traffic signals and road signs, and act with your own judgment or assistance from trusted people. Do not use this app as the sole basis for crossing streets, navigation decisions, or any potentially dangerous situation. All information provided by the app is assistive and for reference only. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Sullivan+ at 86% against Perception Assist's 0%. Sullivan+ also leads on rating (4.4 vs 3.7) and monetization model (free vs free with in-app purchases). Perception Assist's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, in-app purchases and device support 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. Sullivan+ sells 3 in-app purchases, starting at $9.99 per month and Perception Assist sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Sullivan+ holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: Sullivan+ has 22 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 86% of Sullivan+'s written reviews are positive against 0% of Perception Assist's.
Sullivan+ ships an update every 2 months, Perception Assist every 2 weeks. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.
| Parameter | Sullivan+ | Perception Assist |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (22 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 85.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 22 — better | 3 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 136 MB | 61 MB |
| Age rating | 4+ | 12+ |
| Developer | TUAT Inc. | 南京组团趣信息科技有限公司 |
Customer experience
Sullivan+
Perception Assist
In-app purchases
Sullivan+
- Pro$9.991 Month
- Pro Usage 5,000 Top-Up$2.99
- Pro Usage 15,000 Top-Up$6.99
Perception Assist
- Cloud AI Guard Monthly Plan$4.991 Month
- Cloud AI Annual Protection Plan$59.991 Year
- Basic Detection Pack$0.99
- Temp Boost Pack$4.99
- Short-Term Boost Pack$6.99
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- Travel Boost Pack$129.99









