Sjcam SJ4000
Score: 74/100
Sixmou i3
Score: 53/100Rankings
The SJ4000 Pro-Grade delivers 4K video with 3-axis EIS, dual removable batteries and waterproof protection, making it a solid budget option, though its limited frame rates, short 4K battery life and lack of external audio inputs keep it from professional use.
The Sixmou i3 is an ultra-compact, thumb-sized action camera that delivers 4K video, deep waterproof capability with its case, and versatile magnetic mounting. Its tiny size and pass-through charging make it ideal for discreet POV capture, though it lacks a built-in display and depends on a smartphone app.
| Attribute | | |
|---|---|---|
2,160 p | 3,840 pbest | |
30 fpsbest | 30 fpsbest | |
1.17 hours | 2.5 hoursbest | |
| ↓ lower better | 230 g | 35.7 gbest |
30 m | 40 mbest | |
170 degreesbest | — | |
900 mAhbest | 800 mAh | |
| ↓ lower better | 3.5 hoursbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Build & Design(2) | ||
Weight (g) | 230 g | 35.7 g |
Waterproof Depth (m) | 30 m | 40 m |
Battery & Power(2) | ||
Battery Capacity (mAh) | 900 mAh | 800 mAh |
Battery Life (hours) | 1.17 hours | 2.5 hours |
Video & Imaging(1) | ||
Video Resolution (p) | 2160 p | 3840x2160 p |
Storage(1) | ||
Storage Type | microSD | MicroSD |
Connectivity(1) | ||
USB Type | Micro-USB | USB-C |
Products in the top-left offer the best value (high score, low price).
Professional reviewers view the SJ4000 Pro-Grade as a compelling budget alternative, praising its 4K capability, solid stabilization and generous accessory bundle, while warning that its sensor size limits photo quality and its lack of HDMI or external mic makes it unsuitable for higher-end productions.
Everyday users appreciate the camera's compactness, waterproof housing and dual-battery endurance for outdoor activities, but repeatedly criticize the misleading 40 MP photo claim, short battery life in 4K, limited Wi-Fi range and the absence of professional audio inputs.
Professional editors note the i3's ultra-portability and magnetic mounting as its primary strengths, positioning it as a niche wearable alternative to the Insta360 Go series, while pointing out the lack of a built-in display and reliance on a smartphone app as drawbacks.
Everyday users love the camera's tiny form factor, comfort, and the convenience of magnetic mounting, while common frustrations involve Wi-Fi app connectivity, low-light performance, and case fogging.
“Perfect for hiking and snorkeling-small, waterproof, and takes great 4K video.”
“Love the dual batteries-no need to stop and recharge mid-adventure.”
“SJCAM Zone app works well for remote control and downloading clips.”
