About DiveNav Techbuddy 4.0 Data Logger

DiveNav has developed a quick and easy way to download, view and share details about your recent dives with the DiveNav Techbuddy 4.0 Data Logger. The DiveNav Techbuddy 4.0 is built tough and can handle depths to 426 ft. (130m). It offers a 5-year integrated lithium battery and can store up to 300 dives. The DiveNav Techbuddy 4.0 is constructed with a 2-pin wet sensor and can be used in either imperial or metric measuring systems.

Simply attach the Techbuddy to your BCD or stash it in your pocket and forget about it during your dive. As soon as you enter the water the Techbuddy 4.0 will be gathering information about your dive just the same as your dive computer.

Here is where the Techbuddy 4.0 stands alone as far as dive logging goes. The DiveNav Techbuddy 4.0 is Bluetooth 4.0 equipped, so as soon as you exit the water you can download your dive information straight to your smartphone. All you need is either the My bluebuddy, or divePAL app by Divenav, which is available on most smartphones. With the app you can enter in dive site information, your gear, images and your dive buddies. The best part is; you can share your dive log and site information to social media as soon as you ve completed your dive. No more waiting until you get home to sync up your dive log from your dive computer to your laptop.

DiveNav Techbuddy 4.0 Data Logger Features

  • Rated to 426 ft. (130 m)
  • Bluetooth 4.0 equipped
  • Download your dive log as soon as you exit the water
  • Syncs to your smartphone
  • Downloadable app allows you to store information
  • Share your dive logs to Facebook, Twitter, or other social media
  • Can store up to 300 dives
  • Integrated lithium battery
  • Extremely small 2.3 x 1.28 x 0.46 in. (59 x 33 x 12 mm)

DiveNav Techbuddy 4.0 Data Logger Specifications

Depth rating
426 ft. (130 m)
Integrated, lithium ~5-year
Memory Capacity
300 dives
2.3 x 1.28 x 0.46 in. (59 x 33 x 12 mm)
Weight [with packaging]
.15 lbs. (.06 kg)
Weight [with packaging]
.15 lbs. (.06 kg)

DiveNav Techbuddy 4.0 Data Logger Customer Reviews

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by PowerReviews
DivenavBluebuddy Techbuddy 4.0 Data Logger

(based on 1 review)

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Reviewed by 1 customer

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Software is really buggy

By jhutch

from Houston

About Me Advanced

Verified Buyer


  • It Logged My Dives
  • Says It Lasts For 5 Years
  • Small Form Factor


  • Had To Update Os On Phone
  • Included Splitring Rusted
  • Limited Functions
  • Not Air Integrated
  • Req Update Os On Phone
  • Software Still Crashes

Best Uses

  • As A Backup Log
  • Not As Backup Dc
  • Recreation

Comments about Divenav Bluebuddy Techbuddy 4.0 Data Logger:

I have an Aeris Compumask for my primary DC (and it logs data flawlessly). I bought this as a backup, and because it's a cool idea to be able to interface with your phone... but that's where the problems come in. I had to update the OS to even connect to this, and the software keeps crashing! I couldn't transfer the dives the first few times I tried, and when I eventually got them to my phone, the software kept crashing when I was trying to look at the details.

On a positive note, though... the software problems will get worked out (I'm sure). In the mean time, this thing will log your dives. I'm going to keep it clipped to my BCD from now on, and wait for the software to catch up.

I know I'm asking too much for it to be air integrated... but I know I'm not asking too much for the software to work!

  • Diving Type:
  • Cave Diving, Drift Diving, Night Diving, Open Water Diving, Rescue Diving, Wreck Diving
  • Was this a gift?:
  • No

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