Suunto vs Heinrichs Weikamp
EON CORE AQUA BLUE vs OSTC+
Which screen and control layout suits the way you dive?
Suunto
Scores are our editorial opinion of these models, based on features, suitability and ownership trade-offs—not hands-on test results. How we chose →
We’d pick the OSTC+.
We’d start with Heinrichs Weikamp OSTC+. We would shortlist OSTC+ for its 2.4-inch screen, recessed controls and choice of sport or technical firmware. Choose Suunto EON CORE AQUA BLUE instead if its strengths are a better match: we like EON Core as a dedicated Suunto option for divers who prefer a larger dive-focused format.
Which one suits you?
Suunto EON CORE AQUA BLUE
We like EON Core as a dedicated Suunto option for divers who prefer a larger dive-focused format. Check the transmitter ecosystem and the full package before changing from another brand.
Get to know this model →Heinrichs Weikamp OSTC+
We would shortlist OSTC+ for its 2.4-inch screen, recessed controls and choice of sport or technical firmware. Check the firmware included in the price; an optional sensor socket is a separate configuration.
Get to know this model →Specifications side by side
The details that matter, side by side. “Check with the brand” means we have not confirmed that detail.
| Detail | Suunto EON CORE AQUA BLUE | Heinrichs Weikamp OSTC+ |
|---|---|---|
| Display | Colour screen | 2.4-inch LCD-TFT |
| BatteryCheck with the brand | Rechargeable | Check with the brand |
| Pressure accessoryCheck with the brand | Suunto Tank POD compatible | Check with the brand |
| Log connectivityCheck with the brand | Suunto app | Check with the brand |
| FinishCheck with the brand | Aqua Blue | Check with the brand |
| ControlsCheck with the brand | Check with the brand | Two recessed sensor buttons |
| FirmwareCheck with the brand | Check with the brand | hwOS sport or TECH; package dependent |
| ChargingCheck with the brand | Check with the brand | Wireless |
| Optional socketCheck with the brand | Check with the brand | Fischer or S8 |
Showing all 9 specification rows.
What the differences mean when you buy
Display and control format
Suunto EON CORE AQUA BLUE
- Display
- Colour screen
Heinrichs Weikamp OSTC+
- Display
- 2.4-inch LCD-TFT
Look at the main information at normal wrist or console distance, with your usual vision correction. Display technology and diagonal size are useful facts, but they do not predict your ability to read smaller secondary information. Try menu navigation and controls with gloves. A feature upgrade within one family may retain exactly the same screen size.
Pressure monitoring and compatible accessories
Suunto EON CORE AQUA BLUE
- Pressure accessory
- Suunto Tank POD compatible
Heinrichs Weikamp OSTC+
Ask the brand about this detail before ordering.
Identify whether pressure comes from a compatible wireless transmitter, a direct hose connection or a separate instrument. Optional support does not mean the accessory is included. Confirm the exact transmitter generation, number supported and installation requirements. A shared radio concept or brand family is not enough to assume cross-model compatibility.
Battery, modes and ownership
Suunto EON CORE AQUA BLUE
- Battery
- Rechargeable
- Log connectivity
- Suunto app
Heinrichs Weikamp OSTC+
Ask the brand about this detail before ordering.
Check the current manual for supported modes and settings rather than relying on the computer’s price tier. Rechargeable and replaceable batteries create different travel routines. Confirm approved battery types, charging hardware and the supported logging workflow. An algorithm name is not a promise of identical behaviour across computers or firmware versions.
A closer look at both
EON CORE AQUA BLUE
This Aqua Blue version of the EON Core is a compact colour-screen dive computer with a rechargeable battery. Suunto lists connectivity with its app and Tank POD pressure transmitter. The display-and-battery combination is its main distinction from watch-style computers such as the D6i Novo.
What we like
We like EON Core as a dedicated Suunto option for divers who prefer a larger dive-focused format.
What would make us think twice
Check the transmitter ecosystem and the full package before changing from another brand.
More about the EON CORE AQUA BLUE →OSTC+
The current OSTC+ pairs a 2.4-inch LCD-TFT display with two recessed sensor buttons. Heinrichs Weikamp offers hwOS sport and TECH firmware, wireless charging and Bluetooth connectivity. An optional Fischer or S8 socket is a separate configuration for compatible oxygen-monitoring applications.
What we like
We would shortlist OSTC+ for its 2.4-inch screen, recessed controls and choice of sport or technical firmware.
What would make us think twice
Check the firmware included in the price; an optional sensor socket is a separate configuration.
More about the OSTC+ →Four checks before you place an order
- Try the display and secondary information at the distance you will actually read it.
- Confirm required diving modes and the exact model or wired-system variant against the current manual.
- Identify compatible transmitters, chargers and any separately purchased installation parts.
- Review battery procedures, firmware support, logging compatibility and local servicing before paying.
Ask for a quote for the complete kit, including the accessories you need. That makes the price comparison much more useful.
Price, accessories and owning the equipment
Request a computer-only and complete-system price if pressure integration is part of the decision. Transmitters, charging accessories and installation can change the apparent upgrade cost substantially. The price of replacing accessories you already own belongs in the comparison as well; do not assume cross-brand or cross-generation compatibility.
Upgrade for a feature you will actually use: a clearer display, tank pressure on the wrist or a mode your diving calls for. We would rather have a readable everyday screen than a long menu of functions we never open.
How we scored these models & further reading
These are our subjective buying scores out of 100. We weigh the usefulness of the features, the intended diving or carrying job, and the compromises involved in owning the gear. They are not laboratory measurements, safety grades or customer averages. The verdict applies to the two named models, not everything either brand makes.
90–100: one of our first choices for the stated job. 80–89: a strong option with trade-offs. 70–79: a more specific fit. A different fit, camera, valve or dive plan can change which one you should buy.
Suunto EON CORE AQUA BLUE
Product details and further reading →Heinrichs Weikamp OSTC+
Product details and further reading →Questions worth settling
Can I make the simpler model equivalent by adding a transmitter?
Only if that exact computer supports the compatible transmitter. Optional accessories cannot supply a capability the base computer does not have. Check the model-specific manual and the full compatible package before buying either component.
Which is the better buy for this particular comparison?
Suunto EON CORE AQUA BLUE: Check the transmitter ecosystem and the full package before changing from another brand. Heinrichs Weikamp OSTC+: Check the firmware included in the price; an optional sensor socket is a separate configuration.
Our pick is where we would start. Choose the other model if its fit or features better match your setup—especially where a camera, valve, boot or exposure suit needs an exact match.
