Apologies if this isn’t the right topic to be posting this issue but it is certainly pertinent to the use of external HR sensors with the Suunto Run. Putting aside the issues i have had with the Coros armband which i have posted about in that specific topic i have also experienced issues when using a chest strap. The HR graph normally looks absolutely fine as expected but i am usually given a different max heart rate in the run summary. [image: 1772494841112-screenshot_2026-02-22-18-21-23-970_com.stt.android.suunto.jpg] [image: 1772494883386-screenshot_2026-02-22-18-21-44-133_com.stt.android.suunto.jpg] This example is from a run where i chucked in three sprints and as the graph shows my heart rate doesn’t go above 180 which is inline with what i expect for the effort. With a chest strap the Heart rate summary seems to always be different to the graph. What’s odd is when using a chest strap, which works perfectly with my other watches, i get this max heart rate discrepancy and the synced data in Strava will show a mix of the correct max heart rate which is reflected in the Suunto produced graph or it will show what i’m sure is the incorrect max heart figure as produced in the Suunto app summary. There seems to be something going on here with the relationship between watch and external sensors and how the data is all displayed within the app. Is this something seen before on Suunto or unique to how they process the data? My experience with Suunto only extends to the use of the Suunto Run having used Garmin for years.

@Philip A €100 watch can display many metrics, but that doesn’t mean the data quality is comparable. More numbers do not necessarily mean better measurement. We don’t know exactly which computational models Suunto uses on the Vertical 1. Sleep and HRV algorithms are strongly tied to the hardware, especially to the OHR sensor and signal quality. The Vertical 2 uses different hardware and a different optical heart rate sensor. It is plausible that any algorithmic evolutions are designed around the newer sensor and are not backward compatible with the Vertical 1. For this reason, realistically, it is difficult to expect major new implementations on the V1. Future developments are more likely to focus on the newer hardware platform. The price of the device is not the decisive factor. The hardware architecture is. EDIT: From the photos, the Suunto Ocean sensor appears to be the same as the one in the Vertical 1, and the Ocean does report deep, REM, and light sleep stages. So, in theory, the Vertical could inherit those features. That said, I may be oversimplifying. Even if the hardware looks similar, firmware architecture, signal processing, and model calibration can differ significantly between devices.

@PetrMisek If you swipe across the graph, the app shows you the legend for each bar. Red indicates very high stress.

I wanted to try the route planner and found a bug that makes planning impossible. In the “Outdoor” map view, forest and dirt roads are displayed as regular roads. Only after zooming out to a certain level do they appear correctly as dashed green lines. However, at that zoom level not all paths are displayed anymore. The dark map mode works exactly the opposite way. Even at the highest zoom level, forest and dirt roads are displayed correctly as dashed lines, but from the same zoom-out level they start to be drawn as regular roads. [image: 1772911649342-b7009e92-e727-4c06-959a-edb5b376f284-image.png] [image: 1772911667337-231d2f3e-6ed0-4432-b3d3-a2288c117f3c-image.png] [image: 1772911725773-ad2281ea-65e3-4c51-836c-4858e1583a3e-image.png] [image: 1772911750528-87680971-631a-4a81-a595-7d997139edeb-image.png] In Suunto Android app, the same forest and dirt roads are displayed correctly as full or dashed green lines.

I’d like to take this opportunity to ask a question: do these alerts sound on yours? Mine only gets a faint vibration (it would be nice if it also notified you when you leave Zonesense zones).

@Divingpassion Full support for showing actual Bar under 30. The Cobra stopped showing under 10, the EON also stops u der 30 to display then remainig tank pressure.

@paolo-1 Use RunGap, it will upload all Apple Workouts or Strava to Suunto. You will have to pay a small fee and you can find RunGap in the App Store. In the future add SportsTracker app to your iPhone and Apple Watch and connect the Apple Watch. SportsTracker is developed by Suunto and will automatically sync Apple workouts and SportsTracker workouts on the Apple Watch to the Suunto app. SportsTracker and Suunto app share the same database.

@todgerama Just curious… what was the solution after those replacements? Did they tell you to service the watch regularly with some silicon oil (I suppose) applied to the base of the buttons? I bought this watch for this purpose only I cannot accept it that it leaks water inside nevertheless.

@Ray-de-Jager I did pair again after the update… and dived. But now it has forgotten the POD after deep sleep. @voigas Yes, the POD must have pressure to turn on. The EON pairs auto, always (this time also)… I stille use the EON as a backup (which turned out to be a good decision on this dive). It is just a software bug i the Nautic… either in loading config or in re-scan for the POSs after turned on if the POD is in the config - and if the POD is not present then give a Warning POD not found! (This might be good if someone has forgot to turn on the air on, also!) I guess that it will be solved soon…

@OutdoorMan A similar issue has been reported on Reddit: https://www.reddit.com/r/Suunto/comments/1rnesu9/froze_mid_run/

Hey everyone! Glad to announce that Live Groups is finally in the early preview stage, and you can try it out right now. You don’t even need the latest version to get started. Group setup can be done entirely through the web interface. Here is all you need to do: Connect your Suunto account in the app. Confirm your email via your web profile (don’t worry, I won’t send any spam). Create a group and manually add your partners. You can also invite people via an invite link, but that’s currently only available in the TestFlight version. You able to add to group any user with linked Suunto account The link to watch the group live will look like this: live.athletica.one/live/+group-name I’ve recorded a short walkthrough video to show how it all works: https://drive.proton.me/urls/8RA2GZJHFC#3SfMbzrSV8sR And quick demo how it looks for spectators: https://drive.proton.me/urls/0NXMP4BV1R#zxaE0CLPdcwh Since this feature is in early access, I would be REALLY grateful for any feedback! Let me know how it works for you or your club.

Bonjour je vous rassure c 'est toujours le cas sur la run en mars 2026

@matteo_000 I am also a little upset by this behavior after my first spring ride with the new Vertical 2 ️ Special display/map setting for bike would definitely be very beneficial.

Hi everyone, I am experiencing similar issues on my Suunto Race since a few weeks. The heart rate is often too low (so far only observed while running), sometimes there are sudden jumps after a while. When using an external heart rate sensor, it works. What you should do if you experience the same: Contact Suunto Support! Only then they will now about it. I did this and they told me they are currently not aware of such an issue, but will investigate. They also asked me to upload my log files via the mobile app and will check them. The more people report this, the higher chance that this gets fixed soon. You can find their support chat directly on www.suunto.com by clicking on ‘Support’ at the top and then using the chat on the bottom right.

@reijervanrijsbergen I’m having the exact same issue. It’s further complicated by GNSS jamming. I’ve noticed that once the heart rate signal is lost, it doesn’t always recover, even when the watch is worn directly on my wrist rather than over a jacket. Coros HRM + Suunto Race S.

@ahstreak Bonjour je viens d acquérir une suunto run depuis vendredi dernier les cadrans y sont bien mais pas synchronisables. J ai dialogué hier avec un gars du support suunto il m a répondu que l application mobile avait des problèmes de synchronisation. J espère que cela va être resolu car ça commence mal pour moi avec ce produit . Je m interroge sur la fiabilité de cette application . Je souhaite que tout se passe pour le mieux ensuite car pour l instant je suis déçu du produit.