Quell Flex vs Pain
Price, ratings, monetisation and update history for both apps, side by side — 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.
Pain
This app provides a personalized and holistic approach to overcoming chronic back pain. It offers tailored exercise routines, mental training techniques, and lifestyle tips to help users achieve long-lasting relief and regain mobility.
- Comprehensive pain relief for various conditions
- Customized exercise plans
- Mental training for pain alleviation
- Evidence-based solutions
- Holistic approach with posture and lifestyle tips
- Ongoing support and community
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Transform your life by overcoming chronic back pain with the Pain-Free Back App, developed by Nir Yogev, a 3rd Degree Black Belt Aikido Master with over 6,000 success stories. This app offers a personalized and holistic approach to achieving long-lasting relief, targeting a wide range of pain conditions. **Key Features:** - **Comprehensive Pain Relief**: Effective for lower back pain, upper back pain, middle back pain, neck pain, tailbone pain, hip joint pain, waist pain, scoliosis, fibromyalgia, neuropathy, osteoporosis, knee pain, sciatica (leg and buttocks projection), shoulder pain, and scapula pain. - **Customized Exercise Plans**: Receive tailored exercise routines designed by Nir Yogev to address your specific symptoms and help you regain mobility with confidence. - **Mental Training for Pain Relief**: Embed mental training techniques into your routine to alleviate the mental sources of pain, reducing stress and enhancing overall well-being. - **Evidence-Based Solutions**: All programs are grounded in proven methods, ensuring you get reliable advice without resorting to untested gadgets or gimmicks. - **Holistic Approach**: Beyond exercises, the app offers tips on posture correction, stress management, and lifestyle adjustments to support your journey to a pain-free life. - **Ongoing Support**: Stay motivated with continuous updates, new content, and a supportive community committed to helping you live pain-free. Whether you're dealing with chronic pain, recovering from an injury, or managing complex conditions like scoliosis and fibromyalgia, the Pain-Free Back Program by Nir Yogev is your comprehensive resource for reclaiming control of your life, both physically and mentally. Read our full Terms of Service and our Privacy Policy: https://passion.io/terms-of-service https://passion.io/privacy-policy
Screenshots
Verdict
The clearest difference is ads: Quell Flex at none against Pain's shown. Pain's advantage is update cadence (every 3 months vs every 35 months) and device support (3 vs 1). On price, in-app purchases and iOS requirement 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.
Quell Flex ships an update every 35 months, Pain every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | Quell Flex | Pain |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 35 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 23 MB | 88 MB |
| Age rating | 12+ | 4+ |
| Developer | NeuroMetrix, Inc. | PAIN FREE BACK LIMITED |
In-app purchases
Quell Flex
No in-app purchases
Pain
No in-app purchases









