EGD2021 vs EchoSense
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EGD2021
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This version of the app is written by Lam Yeung Shun under the supervision of Dr. Shiu Yin Yuen. The application will act as a guide dog, as an auxiliary tool to guide the visually impaired people (VIP) to the destination in both indoor and outdoor environments. Under the guidance of the navigation, the VIP can easily follow the instructions from the recorded path. The path can be recorded by themselves or received from other users.
EchoSense
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EchoSense – Navigate with Confidence EchoSense pairs seamlessly with the echosense_v1 hardware to provide real-time obstacle detection and guidance for individuals with visual impairments or anyone in need of enhanced spatial awareness. Using advanced AI and haptic feedback, EchoSense transforms your surroundings into intuitive vibrations. Simply connect the echosense_v1 device via Bluetooth, launch the app, and start moving — EchoSense will alert you when nearby objects are detected, helping you navigate safely and confidently. Get started in just seconds — connect, scan, and let EchoSense be your sixth sense.
Screenshots
Verdict
The clearest difference is update cadence: EchoSense at every 5 months against EGD2021's every 25 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. Neither carries in-app purchases, so what you see is what you pay.
EGD2021 ships an update every 25 months, EchoSense every 5 months. The most recent releases landed on September 8, 2026 and September 12, 2026 respectively.
| Parameter | EGD2021 | EchoSense |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 25 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Shiu Yin Yuen | K12 Ventures Foundation, Inc. |
In-app purchases
EGD2021
No in-app purchases
EchoSense
No in-app purchases
