Comparison

Quell Flex vs Pain

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Quell Flex

Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

Quell Flex4 screens
Pain3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Quell Flex versus Pain: the parameters behind the verdict, then further details
ParameterQuell FlexPain
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 35 monthsEvery 3 months — better
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.615.1 — better
Further details — not scored
Size23 MB88 MB
Age rating12+4+
DeveloperNeuroMetrix, Inc.PAIN FREE BACK LIMITED

In-app purchases

None

Quell Flex

No in-app purchases

None

Pain

No in-app purchases

Questions

Is Quell Flex free?
Quell Flex is free to download, with no in-app purchases.
Is Pain free?
Pain is free to download, with no in-app purchases.
Do Quell Flex or Pain have ads?
Pain shows ads; Quell Flex does not.
Which is updated more often, Quell Flex or Pain?
Quell Flex ships an update every 35 months, and Pain every 3 months. Most recently, Quell Flex was updated on November 3, 2026 and Pain on November 4, 2026.

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