Entry-Level Dive Computers: Shearwater Peregrine vs Suunto D4i

The entry-level market, circa 2026

For years, the entry-level dive computer segment meant small wrist-watch units with tiny monochrome screens. Then Shearwater — a company previously known for tech diving hardware — released the Peregrine, a large full-color console computer at a recreational price point. It changed what new divers expect.

The Suunto D4i Novo remains a strong competitor at a similar price. But the two computers target very different users.

Shearwater Peregrine: big screen, simple menus

The Peregrine is a hockey-puck-sized unit with a 2.2-inch color screen that is legible at any angle, in any light. The UI uses two buttons and is almost impossible to get lost in. Firmware updates are free for life, and Shearwater support has a sterling reputation.

It runs Buhlmann ZHL-16C with Gradient Factors, the same algorithm used in technical computers. For a new diver this means nothing — the default settings are conservative and safe. For a diver who later moves into tec, it means the computer grows with them.

Downsides: it is bigger than most wrist computers, which some divers dislike. It has no air integration option. And the battery is rechargeable (USB), which is either a feature or a flaw depending on your travel habits.

Suunto D4i Novo: sleek, travel-friendly, freedive mode

The D4i Novo is a traditional wrist-watch-style computer. It looks like a sport watch out of the water and can be worn every day. It supports freediving mode, which the Peregrine does not. It has optional air integration via a wireless transmitter.

The screen is smaller and monochrome. The menu system is more complex and takes longer to learn. The Suunto Fused RGBM algorithm is more conservative than Buhlmann, which can shorten no-decompression times on repetitive dives.

Which one should you buy?

Buy the Peregrine if you plan to do any of: more than 20 dives per year, any kind of course progression beyond Advanced Open Water, boat diving where you want a screen you can glance at, or eventual tec diving. It is the better tool for scuba, full stop.

Buy the D4i Novo if you want a single device that also works as a daily watch, if you freedive, or if the Peregrine's size bothers you. Both are excellent; they just optimize for different users.