A large display is useful only if its information is arranged in a way you can read. Small watch-style computers save wrist space, while rectangular bodies can give labels and numbers more room. This guide compares physical formats and charging choices without claiming a laboratory visibility winner.
Updated · Manufacturer specifications and published review evidence
How we chose and ordered these picks
Rectangular everyday options lead, followed by compact watches and a larger specialist display. Test the interface yourself before choosing on screen diagonal alone.
List position is an editorial recommendation, not a review score. The selection uses the documented features and limitations below. We have not personally tested this equipment. Verified publisher scores, where available, are shown separately and link to their evidence. Our catalogue is still being researched; inclusion does not mean a product has a completed scored review.
The shortlist at a glance
Choose a model to jump to its details. Compare the exact configuration before ordering.
A rectangular dive computer built around a 2.2-inch colour LCD and two-button controls. Air, nitrox, three-gas nitrox and gauge modes cover its core functions; vibration alerts and wireless charging keep the interface straightforward.
Display
2.2-inch LCD
Weight
122 g
Battery
Rechargeable; wireless charging
Wireless tank pressure
No
Digital compass
No
What to check
Compare with the Peregrine TX if wireless tank pressure or an integrated compass matters. The standard Peregrine does not offer those features. Check screen readability on your wrist before choosing a smaller watch format.
Published review score: 88/100★★★★★★★★★★4.40/51 rated publisher group(s) · not the position in this list
The Peregrine TX combines a large rectangular colour display with wireless tank-pressure support and a tilt-compensated compass. It supports up to four optional transmitters and retains two-button operation, vibration alerts and wireless charging.
Display
2.2-inch LCD
Weight
125 g
Battery
Rechargeable; wireless charging
Wireless tank pressure
Yes; up to 4 optional transmitters
Digital compass
Yes
What to check
A transmitter is optional equipment: check the bundle before budgeting. Compare the larger display against the smaller Tern TX; both offer tank-pressure integration, but their shape and screen technology differ.
No verified independent overall score yet. Compare the specifications and limitations above.
The Perdix 2 is a rectangular dive computer with a 2.2-inch colour display, titanium bezel and piezoelectric buttons. A user-replaceable AA battery, vibration alerts and support for four wireless pressure transmitters are its practical distinguishing features. This is the Perdix 2, not the original Perdix or the newer AMOLED Perdix 3.
Display
2.2-inch colour display
Screen cover
Aluminosilicate glass
Battery
User-replaceable AA
Wireless tank pressure
Up to four compatible transmitters
Alerts
Vibration
What to check
Check the supplied battery type, compatible transmitters and package contents before comparing prices. DiveOtter’s review describes the screen material differently from Shearwater; the specification here follows the manufacturer’s aluminosilicate-glass description. Do not choose advanced diving modes solely because a computer provides them.
Published review score: 96/100★★★★★★★★★★4.80/51 rated publisher group(s) · not the position in this list
A compact, round dive computer with a 1.3-inch AMOLED display and four-button operation. Its air, nitrox, three-gas nitrox, gauge and freediving modes sit alongside vibration alerts and a rechargeable battery. Quick-release straps include a shorter option.
Display
1.3-inch AMOLED
Weight
100 g
Battery
Rechargeable; wireless charging
Wireless tank pressure
No
Digital compass
No
What to check
The standard Tern does not include wireless air integration or a digital compass. Compare with Tern TX if those are priorities; try the compact display in person to assess readability.
No verified independent overall score yet. Compare the specifications and limitations above.
A compact AMOLED dive computer that adds wireless tank-pressure monitoring and a tilt-compensated compass to the Tern format. It accepts up to four transmitters and supports air, nitrox, three-gas nitrox, gauge and freediving modes.
Display
1.3-inch AMOLED
Weight
100 g
Battery
Rechargeable; wireless charging
Wireless tank pressure
Yes; up to 4 optional transmitters
Digital compass
Yes
What to check
Check whether the seller includes a compatible transmitter. For a larger display compare Peregrine TX; for trimix and closed-circuit functionality compare Teric and check its mode requirements.
Published review score: 89/100★★★★★★★★★★4.45/51 rated publisher group(s) · not the position in this list
A dive computer and sports watch with a sapphire-covered AMOLED display, rechargeable battery and digital compass. It supports air and nitrox diving, freediving and wireless tank pressure through a compatible Suunto Tank POD.
Display
1.43-inch AMOLED
Weight
99 g
Battery
Rechargeable lithium-ion
Wireless tank pressure
Yes; optional Suunto Tank POD
Digital compass
Yes
What to check
The listed 60 m maximum diving operating depth differs from its 100 m water-resistance rating. Confirm the Tank POD bundle and the features available in your current firmware before buying.
Published review score: 80/100★★★★★★★★★★4.00/51 rated publisher group(s) · not the position in this list
The Petrel 3 is a large rectangular computer with a 2.6-inch AMOLED screen, titanium bezel and replaceable AA battery. It supports vibration alerts and up to four wireless pressure transmitters. Its screen size makes it worth comparing with the smaller-display Perdix models when wrist readability is the main buying priority.
Display
2.6-inch AMOLED
Battery
User-replaceable AA
Bezel
Titanium
Wireless tank pressure
Up to four compatible transmitters
Variant check
Standalone versus wired CCR models
What to check
Petrel 3 is a family with standalone and rebreather-connected versions. Confirm the exact variant; a standalone purchase does not include a rebreather interface. A review of a wired CCR handset cannot establish the performance or compatibility of every Petrel 3 configuration.
No verified independent overall score yet. Compare the specifications and limitations above.
Product research checked 2026-10-03. Specifications can change; confirm the exact model and package.
Before you buy
Check readability with your normal vision correction.
Compare buttons and straps while wearing exposure protection.
Plan charging or battery replacement for the whole trip.
Take two or three suitable models from this list into a comparison, then remove any that fail your fit or compatibility checks. A lower position here can still be the better purchase for your setup. Check the product page for source dates and unresolved details before placing an order.
Is AMOLED always easier to read underwater?
Display technology is only one factor. Brightness settings, font size, layout and your eyesight matter, so the published screen type is not a visibility score.
A new dive computer should solve a specific problem: easier reading, tank-pressure display, a different battery arrangement or functions that match your training.
