Suunto

Suunto EON Core

A lighter, cheaper EON Steel with the same planning engine.

Open BLE sync (libdivecomputer)

Syncs wirelessly with third-party apps (Subsurface, Currents, etc.), not just the manufacturer app.

Suunto EON Core
4.2Comparison Score
$579
Buy on AmazonBuy on Scuba.com
Released2017
Max depth rating200m
AlgorithmSuunto Fused RGBM 2
Air integrationwireless
Wirelessbluetooth
DisplayFull-color matrix display
Batteryrechargeable
Digital compassYes
Gas typesair, nitrox, trimix
Gas switches10
CCR capableYes

"Gas switches" is how many different mixes this computer can be programmed to switch between mid-dive, mostly relevant for technical/staged-decompression diving. It doesn't tell you which gas types (air, nitrox, trimix) are supported. See Gas types and the product description above for that.

Pros
  • Compact, lighter alternative to the EON Steel with the same core dive-planning engine
  • Fully customizable color display and Suunto app integration
  • Supports CCR diving when configured for it
Cons
  • Smaller battery than the EON Steel means shorter time between charges
  • No user-replaceable battery, must charge via USB, plan ahead on multi-day trips
  • Full feature set leans on Suunto's app ecosystem
Diver community sentiment
Mixed opinions

Divers consistently praise the EON Core's colorful, easy-to-read underwater display, its algorithm flexibility, and its feature set (up to 10 gas mixes, nitrox/trimix/CCR support). The most recurring complaint is severe screen glare and near-unreadability in bright surface sunlight or shallow water, which several users called a real design flaw. Battery life is also contentious: brightness settings drastically affect runtime, and multiple divers reported aggressive low-battery lockouts even with hours of charge remaining. A subset of users reported more serious reliability issues, dives aborting mid-dive and firmware-update errors, that pushed some longtime owners to switch to Shearwater.

Scubaboard: EON Core battery lockout/firmware complaintsScubaboard: sunlight readability debateGoDivingCenter: EON Core review

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The EON Core trims the EON Steel’s size and price without touching the underlying algorithm or planning tools, which makes it the better buy for most divers who don’t specifically need the Steel’s bigger battery.