Quell Flex vs EbbChart
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Quell Flex
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After pairing their Quell Flex devices to the Quell Flex app, users can: - Start and stop therapy - Control stimulation intensity - Check therapy status (e.g., time left in session) - Check device battery level - Review informational videos and other materials related to the devices * You should consult your physician before making changes to your chronic pain treatment plan.
EbbChart
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Track your hearing between appointments. An audiogram is a snapshot. If your hearing fluctuates, important changes can happen in the weeks between appointments, when they may otherwise go unrecorded. EbbChart lets you build that record yourself. Run audiogram-style hearing tests on your iPhone, log the symptoms that come with them, and build a longitudinal picture you can take to your ENT or audiologist. CAPTURE ON IPHONE, EXPLORE ON IPAD Install EbbChart on your iPad too. It's free, and your record syncs across both when you sign in with the same account. On the larger screen you can navigate your full hearing history, compare individual audiograms, examine changes within a day and explore treatment timelines. Bring your iPad to your appointment and go through your record with your specialist. FEATURES โข Run audiogram-style hearing tests in minutes โข Track tinnitus, fullness, vertigo, fatigue and other symptoms โข Log treatments, medications and potential triggers โข See how your hearing test results change over time, across tested frequencies โข Compare your hearing test results before and after a treatment โข Generate reports to share with your ENT or audiologist โข Import hearing tests from Apple Health and audiograms from clinic tests โข Connect your record to Claude to ask questions about your trends (you choose what's shared) DESIGNED FOR HEARING THAT FLUCTUATES EbbChart is designed for people whose hearing changes over time, including those living with conditions that cause fluctuating or variable hearing loss. SUPPORTED HEADPHONES โข Apple AirPods Pro (recommended) โข Sony WH-1000XM3 โข Sony WH-1000XM5 Additional headphone support is being added over time. You can also import hearing tests from Apple Health, including tests performed using supported third-party hearing test apps. YOUR DATA, YOUR CONTROL No advertising. No selling of personal data. Export, share, or delete your record at any time. EbbChart is free to use, with optional tips to support development. Tips don't unlock any features. IMPORTANT INFORMATION EbbChart is a personal wellness tool for tracking and recording your own hearing test results and symptoms over time. It does not provide a medical diagnosis or treatment and is not a substitute for professional medical care. Always consult a qualified healthcare professional before making medical decisions. Sudden or rapidly worsening hearing loss can be a medical emergency. If your hearing has changed suddenly, contact a doctor or emergency service straight away. Don't wait to track it in the app.
Screenshots
Verdict
The clearest difference is in-app purchases: Quell Flex at none against EbbChart's 3. EbbChart's advantage is update cadence (every 2 months vs every 35 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. EbbChart sells 3 one-off in-app purchases. Quell Flex asks for nothing beyond the download.
Quell Flex ships an update every 35 months, EbbChart every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Quell Flex | EbbChart |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 35 months | Every 2 months โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone | iPhone, iPad, iPod โ better |
| Requires iOS | 16.6 | 15.1 โ better |
| Further details โ not scored | ||
| Size | 23 MB | 40 MB |
| Age rating | 12+ | 17+ |
| Developer | NeuroMetrix, Inc. | David McAvinue |
In-app purchases
Quell Flex
No in-app purchases
EbbChart
- Support EbbChart$2.99
- Support EbbChart$4.99
- Support EbbChart$12.99
Questions
Is Quell Flex free?
Is EbbChart free?
Do Quell Flex or EbbChart have ads?
Which is updated more often, Quell Flex or EbbChart?
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