ILYEO vs CastleFit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ILYEO
This app guides users through red-light therapy sessions using a connected device. It offers personalized treatment plans, placement instructions, and pain tracking to help manage muscle and joint discomfort.
- Personalized treatment protocols
- Guided placement instructions
- Session calendar and reminders
- Pain tracking and progress logging
- Bluetooth device connectivity
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Meet the ILYEO body app, your companion for getting the most out of your ILYEO bodyPrecision Red-Light Therapy device. ILYEO body is an FDA-registered Class II, 510(k)-exempt medical device indicated for the temporary relief of minor muscle and joint pain, arthritis pain and stiffness, and muscle spasms,and for the temporary increase of local blood circulation. The ILYEO body app connects to your device over Bluetooth to guide every session, so you always know exactly where to place the pad, how long to treat, and how your relief is building over time. WHAT YOU CAN DO IN THE APP Personalized Treatment Protocols Set up guided protocols tailored to where you carry pain,whether it is your neck, shoulder, elbow, wrist and hand, lower back, hip, knee, ankle and foot,upper and mid back, or abdomen. Guided Placement Instructions Step-by-step, in-app instructions help you position the flexible silicone pad correctly against the treatment area for a consistent, effective session every time. Session Calendar and Reminders Keep your routine on track with a built-in session calendar and gentle reminders, so relief stays consistent rather than occasional. Pain Tracking Log how you are feeling before and after sessions to see your own patterns and progress over time, right alongside your treatment history. ABOUT YOUR ILYEO BODY DEVICE ILYEO body pairs precision red light with thermal energy and gentle vibration in a single 10-minute session: 1.Precision Red Light: 662 nm ± 5 nm wavelength, delivered through 12 high-poweredLEDs directly to the treatment area, supporting cellular energy production. 2.Thermal Energy: soothing heat up to 43°C that complements the light therapy experience. 3.Gentle Vibration: adds comfort throughout each session. Independently lab-tested output delivers up to 28 J/cm² of red-light energy in one 10-minute session, with average irradiance up to 47 mW/cm². ILYEO body is third-party tested to IEC medical electrical and photobiological safety standards, so what you get is real, measured, clinic-grade output, not a diluted broad-panel approach. The device itself is cordless, rechargeable, and hands-free, with a medical-grade silicone pad that is free of latex, phthalates, and BPA, and an adjustable 57 cm strap so it stays in place while you go about your day, at your desk, in the car, or making dinner. Download the free ILYEO body app to unlock guided sessions, track your relief, and get more from your device with every use. This app is designed for use with the ILYEO body device, sold separately, and intended for use by adults 18 years of age and older.
CastleFit
This app offers guided stretching and mobility sessions to relieve pain, improve flexibility, and aid recovery. It provides routines for various needs, from injury recovery to pre-training warm-ups, all accessible at home.
- Guided stretch and mobility sessions
- Targeted relief for specific body parts
- HD instructional videos
- Sessions organized by age, ability, and goals
- Active and passive stretching routines
- Device lineup browsing and purchasing
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Relieve pain. Improve flexibility. Recover faster. Castle Fit brings the full CastleFlexx experience to your phone — guided stretch and mobility sessions built around the device that helps treat the root causes of lower back pain, plantar fasciitis, tight calves, hamstring tightness, and limited mobility. Whether you are recovering from an injury, loosening up before training, or building a daily movement habit, Castle Fit gives you a clear, follow-along routine you can do at home. WHAT YOU GET ◆ Dozens of instructional HD videos and relaxing flows ◆ Sessions organized by your age, ability, and goals ◆ Guided programs from leading trainers and therapists ◆ Active and passive stretching routines for full-body mobility ◆ Targeted relief for calves, hamstrings, hips, lower back, and feet SHOP THE FULL RANGE ▸ Browse the complete CastleFlexx device lineup and accessories ▸ Save your favorites to a wishlist ▸ Fast, secure checkout ▸ Track your orders from purchase to delivery ▸ Get updates on new arrivals and restocks TRUSTED BY EXPERTS AND ATHLETES CastleFlexx is recommended by clinicians and chiropractors and used by professional athletes as part of their recovery. The device pairs stretching with core strengthening for a balanced, controlled experience. BUILT FOR YOUR ROUTINE Follow along at your own pace, choose sessions that match how your body feels today, and come back to the flows that work best for you. Everything is designed to keep you moving, mobile, and pain-free. Download Castle Fit and start moving better today.
Screenshots
Verdict
The clearest difference is rating: ILYEO at 5.0 against CastleFit's 4.0. ILYEO also leads on update cadence (weekly vs every 2 weeks). On price, ratings volume, ads and in-app purchases 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.
ILYEO holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
ILYEO ships an update weekly, CastleFit every 2 weeks. Both last shipped on October 31, 2026.
| Parameter | ILYEO | CastleFit |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 2 — better |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 51 MB | 45 MB |
| Age rating | 17+ | 4+ |
| Developer | Joylux Inc. | Castle Flexx |
Customer experience
ILYEO
CastleFit
In-app purchases
ILYEO
No in-app purchases
CastleFit
No in-app purchases
Questions
Is ILYEO free?
Is CastleFit free?
Which has better reviews, ILYEO or CastleFit?
Do ILYEO or CastleFit have ads?
Which is updated more often, ILYEO or CastleFit?
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