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DJI Osmo Action 4 Essential Combo, 4K/120fps vs Sixmou i3 4K Thumb Action Camera, Tiny Size, Mount

Updated August 2026 — DJI Osmo Action 4 Essential Combo, 4K/120fps wins on weight and audio, Sixmou i3 4K Thumb Action Camera, Tiny Size, Mount wins on waterproof and size.

The DJI Osmo Action 4 offers superior video quality and features, making it the better choice for serious users, while the i3 4K Thumb Action Camera excels in portability and affordability.

Why DJI Osmo Action 4 Essential Combo, 4K/120fps is better

Video Quality

Superior low-light performance and 4K at 120fps

Audio Quality

Direct connection to DJI Mic for high-quality audio

Battery Life

Longer battery life in optimal conditions

Why Sixmou i3 4K Thumb Action Camera, Tiny Size, Mount is better

Portability

Smaller and lighter than the DJI camera

Price

Significantly cheaper option

Mounting Options

More versatile mounting capabilities

Overall score

DJI Osmo Action 4 Essential Combo, 4K/120fps
85
Sixmou i3 4K Thumb Action Camera, Tiny Size, Mount
70

Specifications

SpecDJI Osmo Action 4 Essential Combo, 4K/120fpsSixmou i3 4K Thumb Action Camera, Tiny Size, Mount
Resolution4K4K
Frame Rate120fps30fps
Battery Life150 mins90 mins
Waterproof Depth18m40m
Audio InputDJI MicNone

Dimension comparison

DJI Osmo Action 4 Essential Combo, 4K/120fpsSixmou i3 4K Thumb Action Camera, Tiny Size, Mount

Price Comparison

The DJI Osmo Action 4 Essential Combo is priced at $199.00, while the i3 4K Thumb Action Camera is significantly cheaper at $73.99, making it about 63% less expensive. This substantial price difference may appeal to budget-conscious consumers or those new to action cameras who want to test the waters before investing in a more premium model. The Osmo Action 4, however, comes with a comprehensive set of accessories, including a battery and a quick-release adapter mount, which adds value for first-time users looking for an all-in-one package.

Design and Portability

When it comes to design and portability, the i3 4K Thumb Action Camera is the standout choice. Weighing just 1.25 ounces and being smaller than a thumb, it is incredibly lightweight and easy to carry. Its magnetic design allows for versatile mounting options, making it convenient for users who want to capture hands-free footage while cycling or participating in other activities. In contrast, the DJI Osmo Action 4, while still portable, is larger and heavier, making it less ideal for those seeking a compact solution for on-the-go filming.

Camera Features

The DJI Osmo Action 4 boasts advanced features such as a 1/1.3-inch sensor that excels in low-light conditions and can shoot in 4K at a remarkable 120fps. This level of performance makes it suitable for professional use and high-quality video production. Meanwhile, the i3 4K Thumb Action Camera also offers 4K recording but lacks the advanced low-light capabilities and higher frame rate. For users who prioritize video quality and versatility, the DJI model is the clear winner, while the i3 serves as a more basic option.

Battery Life

Both cameras offer commendable battery life, but the DJI Osmo Action 4 takes the lead with a battery life of up to 150 minutes in optimal conditions. The i3 4K Thumb Action Camera matches this duration with its 800mAh battery, allowing up to 150 minutes of recording in 1080P mode. However, it drops to 90 minutes in 4K mode, which may be a concern for users planning to shoot in higher resolutions. For those who prioritize extended recording times without frequent recharging, the DJI Osmo Action 4 presents a more reliable option.

Underwater Capability

For underwater filming, both cameras come equipped with protective features, but the i3 4K Thumb Action Camera has a significant advantage. It includes a waterproof case that allows it to dive up to 131 feet (40 meters), making it suitable for activities like snorkeling and surfing. The DJI Osmo Action 4 is also waterproof, rated for up to 18 meters, but this is considerably less than the i3's capabilities. For users looking to capture aquatic adventures, the i3 provides enhanced versatility in underwater conditions.

Mounting Options

The i3 4K Thumb Action Camera excels in mounting versatility, featuring a magnetic design along with a spring clip and multiple mounting accessories. This allows users to easily attach it to various surfaces, making it ideal for spontaneous filming in a variety of environments. The DJI Osmo Action 4 includes a quick-release adapter mount, but its mounting options are not as extensive as those offered by the i3. For users who value easy and flexible mounting solutions, the i3 is the more practical choice.

Audio Quality

When it comes to audio capabilities, the DJI Osmo Action 4 has an advantage with features that allow it to connect directly to DJI Mic transmitters, ensuring high-quality audio for vlogs and interviews. This is particularly useful for content creators who require clear sound in their recordings. The i3 4K Thumb Action Camera does not mention any specific audio enhancements or external microphone capabilities, which could be a drawback for those focused on producing high-quality audio content.

Which should you buy?

Choosing between the DJI Osmo Action 4 Essential Combo and the i3 4K Thumb Action Camera depends largely on your specific needs and budget. If you prioritize high video quality, professional features, and superior audio capabilities, the DJI Osmo Action 4 is the better investment despite its higher price. However, if portability, ease of use, and affordability are your primary concerns, the i3 4K Thumb Action Camera offers excellent value and versatility for everyday filming. Ultimately, each camera serves a distinct purpose, catering to different types of users in the action camera market.