Hammerhead Karoo 3- first apps released – but where’s Ki2?
Hammerhead Karoo 3 supports 3rd party apps using a recent ‘Extensions’ feature and lets you install Android apps, providing they don’t require a Google Play Certified Device, as Karoo is not one of those. Older Karoo 2 apps will also work on Karoo 3
Hammerhead has just announced the first tranche of new apps, and I’ve reproduced the list below. Strangely absent from this list is Ki2, which I was expecting to be ready by now (edit: see comments; it is working – I briefly installed and paired it with my Di2. Yay!)
- Epic Ride Weather – https://www.epicrideweather.com – Epic Ride Weather provides personalized weather forecasts that consider your speed and location, combining multiple forecasts to give you a precise weather projection for the duration of your ride.
- GiBLI Tech Inc. – https://giblitech.com – GiBLI Tech makes real-time aerodynamic sensors to help cyclists and triathletes reach their ultimate performance potential.
- hDrop Hydration – https://hdroptech.com – hDrop provides real-time sweat monitoring, delivering instant data on sweat loss, rate, and electrolyte levels.
- HR2VP by BIPR – https://bipr.fr/ – HR2VP is a multipurpose cycling app that estimates power based on heart rate and broadcasts to your bike computer.
- myWindsock – https://mywindsock.com – myWindsock provides insightful weather data to the sporting community with signature Iconic Wind Lines.
- VinApp – https://www.instagram.com/vinapp_ciclismo – VinApp and Vin-HKE offer various solutions for the Karoo. From custom alerts to colour data fields and workouts, you can utilize Vin Extensions to maximise your Karoo.
Last Updated on 28 January 2026 by the5krunner
My favourite kit and nutrition
- Injinji – Runners protect your toes. Avoid discomfort and minor injury. Run more. Run faster. I use them.
- Garmin 90-degree charging adapter — A small keyring adapter you can use anywhere. Essential when away. I use one.
- Garmin charging puck — the fastest and most reliable way to top up your Garmin before a session. I use one.
- Ravemen FR300 — Front light that mounts directly under your Garmin or Wahoo head unit. Keeps your bars clean and your beam pointed where it matters. I use one.
- Body Glide – The blue anti-chafe stick that all swimmers and many runners use. I use it.
- Maurten — The race nutrition trusted by elite athletes. Gels and drink mixes engineered to be easy on the stomach. I use them.
- Garmin Varia RTL515 — A radar rear light that alerts you to vehicles approaching from behind. Pairs with your Edge or Wahoo. I use this model.
- Favero Assioma Pro RS2 — The power-meter pedals most serious cyclists choose. Accurate, easy to move between bikes. I use this model.
- Garmin Forerunner 970 — A serious choice for a pro-grade triathlon watch. I use this.
- Polar H10 — My daily driver for accurate, waking HRV readings.
- Wahoo ELEMNT Roam 3 — The bike computer that has the feature Garmin lacks: usability. I use mine on most rides.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID
Ki2 IS ready and working since at least January! I guess they just don’t want to put it on there official website 😁 Just go to https://github.com/valterc/ki2 and sideload it like any other app for the Karoo.
Other great Extensions, that they did not list (yet):
https://github.com/lockevod/Karoo-KDoubleType
Displays two datafields in place of one
https://github.com/timklge/karoo-headwind
Weatherforecast and wind direction data fields
blimey!
thank you Frank
wahoo needs some more wind (forecast) direction data fields too
Alternatively just switch to SRAM RED AXS. No big deal, right?
maybe not big, but certainly expensive.
there’s also new airline rules requiring batteries to be moved from bikes transported by air…SRAM makes that easier too.
This device is tempting me more and more.
I expect no “real world” difference versus my Roam v2, but the excitement of having something to fiddle with is difficult to repulse.
*Difficult to push back, sorry
En la nueva actualización de Karoo3, en extensiones, solamente aparecen seis opciones.
Como puedo instalar allí el Ki2
Gracias
ty @Frank
Just go to https://github.com/valterc/ki2
Frank, me refiero a poder instalar Ki2 directamente en la nueva aplicacion “extensiones’ de karoo3 , no de forma lateral (resultaba muy complicado) como antes.
Gracias