ENGO 3 vs RayNeo iO
Side-by-side comparison of specs, features, and pricing
Specs updated
Where the ENGO 3 wins
- Price: $49.05 cheaper (399.95 vs 449)
Where the RayNeo iO wins
- Weight: 5.5g lighter (33 vs 38.5)
- Battery Life: 24 hours longer battery (48 vs 24)
- Prescription Support: Supports prescription lenses (Yes vs No)
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Specs Comparison
Specs last verified
ENGO 3 $400 vs RayNeo iO $449
| Specification |  ENGO 3 $400 |  RayNeo iO $449 |
|---|---|---|
| Price | ||
| Price | $400 | $449 |
| Optics | ||
| Optics type | — | waveguide |
| Transparency level | — | 97% transparency |
| Prescription support | — | ✓ Yes |
| Diopter range | — | Sold with prescription lenses from $608 (RayNeo store); range undocumented |
| Physical | ||
| Weight (g) | 38.5 | 33 |
| Frame style | sports sunglasses (wide-lens mask) | — |
| Foldable | — | ✕ No |
| IP rating | IP55 | IP54 |
| Battery & power | ||
| Battery life (hours) | 24 | 48 |
| Charging time (min) | 2 | — |
| Connectivity | ||
| Connectivity | Bluetooth 5.4 | Bluetooth 5.4 (Apple MFi licensed) |
| Compatible devices | Garmin watches and bike computers (81+ devices), Apple Watch (Series 4+, watchOS 10.1+), iPhone, Android | iOS, Android |
| Sensors & input | ||
| Camera | ✕ No | ✕ No |
| Microphones | — | 4 |
| Speakers | ✕ No | ✕ No |
| Voice control | — | ✓ Yes |
| AI assistant | — | RayNeo AI + Gemini free; ChatGPT, Claude, DeepSeek, Kimi, Qwen via VIP ($9.99/mo) |
Buy the ENGO 3
Buy the RayNeo iO
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