Video Summary - Garmin CIRQA In-Depth Review // Tested for Accuracy, Battery Life, Workouts, and More

Product overview

The video is an in-depth review of the Garmin Circa—a screenless health and activity tracker that centers on a sensor pod worn on the body (wrist wearable) and also offers an optional armband.

The reviewer tests it heavily for battery life, accuracy, workouts (running/cycling/HIIT/weight training), sleep, and data sync with other Garmin devices. It also includes comparisons to Fitbit Air, Oura Ring, and heart-rate reference devices (ECG chest strap / optical sensors on the arms).

Key features mentioned

Screenless tracker (“pod”) with sensors for:
- Heart rate
- Blood oxygen (SpO2) (including an option to enable it during sleep)
- HRV (heart rate variability)
- Skin temperature
- Sleep tracking
- Accelerometer for steps/activity
Body Battery: combines stress, workout, rest, and sleep to estimate daily energy/recovery.
Sleep insights:
- Resting HR, HRV, skin temperature
- Optional SpO2 during sleep
- Enabling SpO2 unlocks breathing variation
Workout recording methods:
1. App start
2. Side button start/stop (button can be configured to a workout profile)
3. Automatic activity detection (requires ~15 minutes of activity)
Automatic outdoor workouts can use the phone’s GPS (via Garmin Connect) to fill in GPS-based workout details.
Workout/Training metrics (within the Garmin Connect ecosystem):
- Cardiovascular “load” and longer-term training load
- Training status (e.g., strained, peaking)
- Training readiness using load + sleep/recovery metrics
Optional Garmin Connect Plus: expands workout views/fields (especially charts and structured workout support).

Pricing & accessories (pros/cons implied)

$199 includes Circa pod + wristband
Armband option for $29, but only via custom tool (“MyWatch My Way”)
Additional wrist bands: $50
Additional armbands: $60
Reviewer notes band pricing is near/around Whoop band pricing and higher than Fitbit/Polar/Amazfit, placing it on the upper end.
Comfort/quality: bands described as extremely comfortable, stretchy, with a soft felt-like exterior.
Fit size concern: pod/strap dimensions may be too large for smaller wrists (though it fits well for their large–XL wrist). They suggest S–M could also fit some users.

Battery life (main quantitative takeaways)

The reviewer runs side-by-side tests on wrist vs arm with mostly matching settings, and specifically varies SpO2 (SP2) during sleep.

Standalone real-world outcomes

After 5 days (exactly) with SP2 enabled for sleep:
- Low battery notification
- Estimated about 5.5 days
With SP2 off (no SpO2 during sleep):
- About half the consumption
- Roughly 10 days (maybe a bit more)
Battery saver mode exists: turns off everything except steps.

Sleep SpO2 consumption detail

Overnight SpO2 drains ~8–10% on some nights.
Compared with DC Rainmaker’s results: ~1–3% per night.
Hypothesis: motion during sleep can reduce battery life because SpO2 tracking may restart after movement.

Workout drain

In workout tracking:
- ~1% per hour or less with automatic detection
- ~up to 2% per hour when manually recording
Heart-rate broadcasting impacts battery life (uses an additional Bluetooth channel).

Charging

Claimed ~90 minutes for full charge.
In the test: ~20% to 100% took ~1 hour
Uses the standard Garmin charging port (same as newer Garmin watches).

Battery-life “depends on” factors

Activity level (more time in high-fidelity modes = shorter battery)
Whether SpO2 during sleep is enabled
Motion during sleep
Heart-rate broadcasting usage

Health & sleep accuracy / user experience

Body Battery aligns with how well the reviewer slept/recovered and training stress.
Sleep staging is described as decent:
- Resting HR, HRV, sleep duration, and awake periods align well with other devices.
Compared sleep platform: Oura Ring is called one of the better sleep trackers.
Outlier: Circa on wrist reported slightly lower RM on some nights (metric name unclear from subtitles), indicating a minor deviation.

Workout tracking experience (biggest UX strengths + weaknesses)

Manual recording

The button (start/stop) is appreciated for avoiding phone/app interaction.
- Downsides: takes time to learn where it is; no pause function (at this point).
App-based recording is described as the most precise.
- Outdoor profiles can use phone GPS.
- But there’s no GPS sensor or altimeter inside the pod.

Connect Plus vs not (major comparison)

With Connect Plus:
- Running: charts (heart rate graphs, heart rate zones)
- Indoor cardio: charts and more fields
- Structured workouts supported
- Strength training gains:
  - rep counting
  - exercise identification (often close, but sometimes wrong)
Without Connect Plus:
- Running/strength/structured workouts are mostly timer + live heart rate
- Charts/extra fields missing
- Limitation: missing “next set/next reps” buttons for non-Connect Plus users (also mentioned alongside strength-training UX issues)

Automatic workout detection (strength + weakness)

Strength: phone GPS support for outdoor workouts.
Weakness: detection accuracy, especially for strength/HIIT.
Works for walking/running/cycling (indoor and outdoor), but:
- Did not recognize strength training sessions reliably.
- Detection algorithm is described as less advanced than other top trackers (notably for strength/HIIT).
Detection requirements:
- ~15 minutes threshold
- Relies on heart-rate + motion
Detection speed:
- Running notifications fairly quick
- Cycling quick but slightly slower

Detected activity editing/confirmation limitations

Circa can trim start/end times when confirming activities.
If expanding beyond the detected window:
- heart rate data becomes blank for the extra time.
- Reviewer considers this a key missing feature vs other trackers.
Manual logs for missed workouts:
- Subtitles indicate manual entry creates an activity record but lacks workout stats/heart rate.

Algorithm quirks / detected-activity issues described

Start/stop splitting problems:
- Snack breaks (~7–8 minutes) sometimes cause one ride to be split into two rides.
- Fitbit Air keeps it as one ride (preserving cooldown).
- Reviewer retested to confirm it wasn’t a one-off.
- Possible causes: algorithm sensitivity around inactivity duration; heart-rate changes during climb/descent causing segmentation.
Cycling mid-ride tracking stop (wrist unit): observed in one case even though heart rate remained elevated and they were moving.
Strength training detection:
- Not reliably detected.
- Even when other wearables partially captured strength, Circa’s auto detection wasn’t sufficient.
- Recommendation: manual strength logging for now.

Heart-rate accuracy findings (major results + placement comparison)

The reviewer tests with:

Circa on wrist
Circa on arm (biceps)
Fitbit Air on wrist and arm
Reference optical sensors and an ECG chest strap
Scenarios: running, treadmill, intervals, cycling, gravel, and strength training

Running

Wrist Circa:
- Locks on after a short delay
- May miss the very beginning of ramp-up (can’t be expanded for accurate comparison)
- Later shows possible cadence lock (optical HR locking onto footsteps rhythm)
Arm Circa:
- Near-perfect vs other reference optics
- Especially noticeable in cadence-lock behavior

Treadmill and intervals

Arm Circa stays solid across cadence changes.
Wrist Circa shows slight delay during sharp intervals/sprints and sometimes higher/lower wobble.
Overall: mostly timing/dynamics differences, not huge HR errors.

Cycling (road & gravel)

Wrist accuracy impresses for riding.
Arm matches external reference sensors very closely.
Minor blips but good performance overall.

Strength training (hardest case)

Optical HR during strength is difficult for both placements due to grip/movement variability.
Arm is generally better (more stable skin/flesh coverage).
Observations:
- Wrist Circa errors on some bench press sets; rowing was decent but retained HR longer after final set.
- Arm Circa was extremely close to external sensors except for a couple “blips.”
Workout variability (different sides of the body, movement mix) makes exact repeatability difficult.

Conclusion from accuracy portion: arm wearing mode often improves robustness (especially reducing cadence-lock risk), while cycling on wrist is particularly strong. Strength remains inconsistent, though arm performs better.

Syncing with other Garmin devices (user experience)

Reviewer tested by turning off a Garmin Fenix 8 Pro for days, then syncing back.
Most metrics backfilled correctly:
- Body battery, training load/readiness
Issues/outliers:
- HRV status graph not fully backfilled (though HRV data itself backfilled)
- Heart-rate data outliers sometimes not syncing properly
- Reviewer notes Garmin Connect app data appears correct even when watch backfill is inconsistent.

Comparisons made (explicit)

Whoop (band pricing comparison)
Fitbit Air (ride segmentation behavior, workout/activity handling, charts presence)
Oura Ring (sleep benchmark; referenced as excellent)
Other Garmin wearables/watch ecosystem:
- Circa as a companion/add-on for Garmin Edge bike computers and/or Garmin watches
Heart-rate accuracy comparisons:
- ECG chest strap (reference)
- Fitbit Air optical sensors
- Optical sensors on arm down the arm (minimizing interference)

Pros (as implied by the review)

Strong battery life when SpO2 during sleep is off (up to ~10 days in the review’s real-world estimate)
Comfortable, high-quality bands
Good health metrics:
- Body Battery described as meaningful
- Sleep stats align well overall
Good heart-rate accuracy, especially when worn on the arm
Cycling performance is strong even on wrist
Automatic outdoor workouts using phone GPS is clever
Strong fit as an add-on to the Garmin ecosystem, especially for Garmin Edge users

Cons / limitations (most repeated)

Connect Plus is important for richer workout data; without it you mostly get timer + live HR and fewer fields/charts.
Automatic workout detection is weaker than competitors for:
- strength training and HIIT
- occasional segmentation errors (e.g., snack breaks splitting rides)
- sometimes missing parts of workouts (e.g., mid-ride stop on wrist)
Limited editing/expanding detected workouts:
- extended time results in blank heart-rate data
Manual logging of missed workouts may omit workout stats/heart rate.
No pause for button-recorded workouts (start/stop only).
Some bugs observed:
- GPS issues on Pixel during app sync (later fixed)
- V2 Max not updating after an outdoor run
- strength training “next set/next reps” missing without Connect Plus
- audio notification bugs (and other minor issues)

Overall verdict / recommendation (from the reviewer’s conclusion)

Best fit: If you already own a Garmin watch or especially a Garmin Edge bike computer, the Circa is positioned as a high-value companion for always-on health/sleep tracking and flexible wear.
Standalone choice vs competition: “Trickier.” Circa has detailed workout stats, but it relies too much on manual recording, and editing limitations affect the fidelity of metrics when using auto-detection. Automatic detection is also not yet on par with leading screenless competitors.
Conditionally recommended: Great add-on; it could be much more competitive if Garmin improves:
- workout editing to include heart-rate beyond auto-detected windows
- richer manual logging for missed workouts
- automatic detection reliability (especially strength/HIIT)

Unique points mentioned (complete list, deduplicated)

Screenless Garmin Circa exists as a new category entry for Garmin (“worth the wait?”).
Tested for running, cycling, weight training, HIIT, daily wear, sleep.
Tested battery life with/without optional SpO2 during sleep (SP2).
Two modes: high-fidelity while active vs lower fidelity when not active.
Battery life estimates:
- ~5.5 days with SP2 on (low battery at day 5)
- ~10 days+ with SP2 off (and possibly more)
SpO2 during sleep drains more if the user moves during sleep (restarts measurement).
Activity drain:
- auto detection ~1%/hour
- manual recording up to ~2%/hour
Heart-rate broadcasting impacts battery life; battery saver tracks steps only.
Charging claims: ~90 minutes, observed ~1 hour from ~20% to 100%.
Uses standard Garmin charging port.
Sensors include HR, SpO2, HRV, skin temperature, sleep, accelerometer steps.
No altimeter → cannot track floors climbed.
Body Battery reflects sleep/recovery/training stress.
Sleep stats include resting HR, HRV, skin temperature; optional SpO2; breathing variation if SpO2 enabled.
Sleep duration and HR/HRV align well with other devices; minor outlier vs Oura Ring.
Workout logging methods: app, side button (configured profile), and automatic detection.
Button supports start/stop only; reviewer wants pause.
App offers many sport profiles; running includes cadence/stride; outdoor uses phone GPS.
Circa has no built-in GPS and no altimeter.
Connect Plus changes in-workout display:
- Charts/zones/fields and structured workouts with Connect Plus
- Without Connect Plus: mainly timer + live HR; charts missing; strength training limited
Strength training:
- rep counting and exercise identification with Connect Plus
- rep accuracy usually close; exercise ID sometimes wrong
Bug without Connect Plus: missing “next set/next reps” during strength training.
Missing “true live activity view” when phone is locked (contrasts with Whoop/Apple Fitness/Mi fitness apps).
Automatic detection threshold: ~15 minutes.
Auto detection works for walking/running/cycling but not strength training.
Auto-detected outdoor workouts can use phone GPS if Garmin Connect is set to always on.
Notifications for detected activities: running quick; cycling slightly slower.
Wrist auto detection may be less accurate than arm (arm misses fewer start minutes).
Auto detection issues:
- wrist unit stopped recording mid-ride even with elevated HR/motion
- rides split into two on snack breaks (~7–8 min) unlike Fitbit Air
- second day confirmed splitting behavior
Manual edit/confirm limitations:
- only trimming detected window; expanding time gives blank HR data
- reviewer considers this critical for training load/metrics fidelity
Manual logging for missed workouts apparently lacks heart-rate/workout stats.
Training metrics pipeline:
- workout cardiovascular strain/load
- training load over time
- training status (strained/peaking range)
- training readiness for next session
Heart-rate sensor is Garmin 4th gen; advantage includes ability to wear on arm.
Running HR lock:
- wrist shows delayed lock/ramp-down missing start; possible cadence lock mid-run
- arm is very accurate
Treadmill/intervals:
- wrist shows delays on sprints
- arm stays spot-on or closer to references
Cycling on wrist is strong, including gravel riding; arm matches external sensors closely.
Strength training HR:
- both placements can struggle; arm generally better
- wrist had errors on some bench press sets; rowing retention after last set
Wearing placement variability: side-to-side workout variability leads to different results.
Sync test with Fenix 8 Pro after backfilling while turned off:
- most data backfilled correctly
- HRV status graph incomplete; heart rate sync outliers
Bugs encountered:
- GPS not working on Pixel for a few days (later fixed)
- V2 Max not updating after outdoor run
- strength training next set/next reps missing non-Connect Plus
- audio notification bugs
Reviewer’s stance:
- Circa is great as a Garmin companion/add-on, especially for Edge owners
- standalone competition is less favorable until editing/manual logging and auto detection improve
Hope/ask: Garmin likely heard feedback; features could make it “shake things up.”

Different-speaker contributions

Only one main reviewer/narrator appears in the subtitles; no distinct additional speakers are clearly identified (aside from referencing third-party testing such as DC Rainmaker).

Concise final recommendation

Buy/recommend if: you already use Garmin gear (especially Edge) and want screenless sleep/health tracking plus flexible wear.

Wait/consider carefully if: you want a fully standalone screenless workout tracker with excellent automatic strength/HIIT detection and fully editable workout windows with heart-rate included—those areas are not yet as strong.

Garmin CIRQA In-Depth Review // Tested for Accuracy, Battery Life, Workouts, and More

Key takeaways