Sonic Motion vs ReadAid
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sonic Motion
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Sonic Motion is an app that converts the values from the accelerometer, gravity, and rotation sensors into sound in real time. It plays sounds with a soft or hard tone depending on whether the sensor values are positive or negative. Select the motion of the X, Y, or Z axis and experience movement as sound!
ReadAid
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ReadAid is a “read text clearly” tool designed for people with visual impairments and low vision. Using your camera or imported images, it quickly recognizes text and reads it aloud, making it easier to access important information in everyday life. Key Features Real-time recognition: Point at text to recognize it instantly for immediate reading. Photo recognition: Import images from your album to extract text more conveniently. Text-to-speech: Reads the recognized text aloud, freeing your eyes. Unlimited local (on-device) recognition: Available to all users with no usage limits. Use cases: Menus, medication leaflets, shipping labels, books and newspapers, meeting materials, and more. Free vs. Pro (In‑App Purchase) AI recognition (cloud-based) Free users: Up to 3 AI recognitions per day. Pro (requires purchase): Includes an additional 400 AI recognitions, and the daily limit of 3 AI recognitions still applies. Local (on-device) recognition All users: Unlimited. Note: Recognition accuracy depends on lighting and image clarity. For best results, use in good lighting and ensure the text is in focus. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Sonic Motion at none against ReadAid's 1. Sonic Motion also leads on iOS requirement (15.0 vs 26.1). ReadAid's advantage is update cadence (every 3 weeks vs every 15 months). On price, ads 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. ReadAid sells 1 in-app purchase, starting at $1.99 per month. Sonic Motion asks for nothing beyond the download.
Sonic Motion ships an update every 15 months, ReadAid every 3 weeks. The most recent releases landed on September 8, 2026 and September 19, 2026 respectively.
| Parameter | Sonic Motion | ReadAid |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 15 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.1 |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Yoshiyuki Koyanagi | 诗宇 梁 |
In-app purchases
Sonic Motion
No in-app purchases
ReadAid
- ReadAid Pro$1.991 Month
Questions
Is Sonic Motion free?
Is ReadAid free?
Do Sonic Motion or ReadAid have ads?
Which is updated more often, Sonic Motion or ReadAid?
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