Compare Suunto Vertical vs Amazfit T-Rex 3

One reviewer criticized the missing resume-later option as a serious weakness for multi-day activities.

Resume Later was praised as a handy option for long breaks or multi-day treks.

Safety features had limited positive evidence from storm/weather alert usefulness and sunset/weather alerts.

Safety features were damaged by a serious dive-screen battery alert issue and missing full dive-computer safeguards.

Recovery insights were viewed positively, with praise for Suunto’s recovery and fitness feedback plus personalized training guidance.

Recovery insights were one of the weakest areas, especially readiness and sleep scores that often felt too generous or inconsistent.

Reliability had limited positive evidence from one reviewer who described the watch as dependable.

Reliability was hurt by half-baked software, quirks, and features that did not always behave consistently.

Software smoothness was mixed to weak: lag was repeated, though one long-term review saw noticeable improvement after updates.

Software smoothness was often praised for fast, responsive menus, although occasional jitter and isolated map slowdowns appeared.

Fit had limited but positive evidence from one reviewer who said it did not feel chunky on the wrist.

Fit was polarizing because the large case suits bigger wrists but can dominate smaller wrists or get in the way.

Materials quality was praised for the shell, construction, and rugged premium feel.

Materials were acceptable for the price, but several reviewers noted Gorilla Glass and polymer compromises versus sapphire or premium builds.

Value was mixed: reviewers saw the watch as a worthwhile outdoor investment but repeatedly called out high pricing and competitive alternatives.

Value for money was the strongest consensus, with nearly every reviewer calling it impressive for the price.

Band quality had limited but positive evidence from praise for the strap construction and feel.

Band feedback was split: several liked the soft, stretchy straps, while others disliked stiffness or the tool-based swap system.

Watch faces were mixed to weak, with reviewers wanting better faces or noting limited complication choices.

Watch faces were praised as good-looking, plentiful, or well executed.

Charging speed was mixed: one reviewer reported very fast charging, while another could not get fast or full charging in testing.

Charging speed was repeatedly criticized as slow, often around two to three hours from empty.

Menu navigation was mixed, with one review citing slower movement through menus and another calling navigation back to the watch face fiddly.

Menu navigation was only clearly criticized in one review, where the feature volume made menus easy to get lost in.

The companion app was a major strength, especially route planning, map downloads, training data, and general usability.

The Zepp companion app was viewed as improved and sometimes easy, but also fussy, confusing, or crash-prone in several reviews.

Sleep tracking drew mixed evidence: some reviewers found it surprisingly accurate, while others questioned awake-time or motion-based accuracy.

Sleep tracking was mixed: total sleep timing often worked, but several reviewers reported bugs or weak sleep-stage/readiness algorithms.

Comfort was positive, especially band feel, weight, and daily wearability.

Comfort was highly wrist-dependent; some found it surprisingly wearable, while others disliked the bulk or long-term wear.

Third-party app support was praised as practical add-on functionality rather than cosmetic extras.

Third-party support was mixed: Strava and apps could work well, but route syncing and data exports had clear limitations.

Mapping and navigation were a core strength, praised for offline maps, app route planning, trail use, and real-world navigation.

Mapping and navigation were polarizing: reviewers liked free maps and detail for the price, but criticized routing, map quality, and clunky imports.

Heart-rate accuracy was the clearest recurring flaw, with multiple reviewers reporting underestimation, failures, or unreliable wrist readings during workouts.

Heart rate accuracy was mixed: steady running and indoor cycling often worked well, while outdoor cycling and intensity changes were weaker.

Style and design were consistently praised, with reviewers liking the rugged, clean, and distinctive look.

Style and design were subjective but generally positive, with rugged looks, premium feel, and distinctive octagonal styling noted.

Touchscreen responsiveness was mixed: usable in adverse conditions, but several reviewers reported laggy touch interactions.

Touchscreen responsiveness was mostly strong, though water/wetsuit touches and some map modes caused issues.

Brightness was positive indoors and outdoors for some reviewers, though one reviewer felt visibility did not beat bright-display alternatives.

Brightness was consistently praised, especially the high-nit AMOLED screen for outdoor and sunny use.

Cross-platform planning got positive evidence from the ability to use the Suunto app on tablet or macOS desktop.

Cross-platform use works on Android and iOS, but reviewers repeatedly noted iPhone or smartwatch-feature limitations.

Bluetooth connectivity was mixed because sport sensor support exists but the sensor management experience was criticized.

Bluetooth support is useful for sensors, but reviewers reported mixed compatibility and reliability with some accessories.

Wi-Fi map downloads were appreciated when simple, but reviewers also noted desktop-download wishes and slow downloads.

Wi-Fi was only directly evaluated for map downloads, where one reviewer found the process straightforward once connected.

Coaching features were viewed as useful after updates, especially Suunto Coach and training widgets, though evidence was not as broad as for maps or battery life.

Coaching features were mixed, ranging from useful AI plans to advice that did not feel very helpful yet.

Onboard music storage was repeatedly criticized as missing, especially given competitors and the watch’s internal storage.

Onboard music was limited by MP3-only storage, no streaming, headphone requirements, or unintuitive setup.

Build quality was strongly praised, with repeated descriptions of a rugged, premium, sturdy watch.

Build quality was generally praised as rugged and sturdy, with stainless steel, polymer, Gorilla Glass, and durable construction noted.

Smartphone notifications worked, but the review evidence was qualified by limited emoji support.

Smartphone notification usefulness was limited by unreliable raise-to-wake behavior, though basic notification mirroring worked.

Battery life was the strongest consensus strength, praised across every review for long use, multi-day trips, and class-leading endurance.

Battery life was one of the strongest points across reviews, usually lasting many days even with GPS and AMOLED use.

Smartwatch features were a weakness because reviewers found some smart functionality incomplete.

Smartwatch features were good for basics and outdoor extras, but missing speaker/calls and mature app support held it back.

The app ecosystem was useful because of partner apps and SuuntoPlus options, but one-app-at-a-time limits reduced flexibility.

Reviewers found the Zepp ecosystem improving and sometimes useful, but still less mature than Garmin, Coros, Apple, or Google alternatives.

The operating system experience was considered usable but not especially polished or distinctive.

The operating experience was generally smooth and responsive, though some software features still felt immature.

Display quality was mostly positive for readability and screen size, but several reviewers wanted a larger or more modern display.

Display quality was widely praised for AMOLED color, size, clarity, and crispness, with only a few premium-screen caveats.

Contactless payments were a weakness because reviewers explicitly noted the lack of NFC payments.

Contactless payments were a common weak spot due to Curve, regional limits, missing support, or setup failures.

Flashlight usefulness was mixed: early reviews criticized activation as cumbersome, while later use found it handy after shortcut changes.

Flashlight usefulness was mixed: screen flashlight features helped some users, but lack of a real LED flashlight disappointed others.

Durability was strongly supported by long-term and hands-on evidence, including no durability concerns after heavy use.

Durability was broadly positive, with reviewers reporting rugged use, no damage, and strong water/weather confidence.

GPS accuracy was strongly praised across reviews for hiking, running, city use, and difficult terrain, though some reviewers separated this from weaker open-water results.

GPS accuracy was a major strength, with most reviewers reporting reliable or very good tracks except isolated caveats.

Outdoor visibility was usually strong in bright sun, but long-term testing noted glare in some cloudy conditions.

Outdoor visibility was a consistent highlight thanks to bright AMOLED readability in sun and varied conditions.

Button controls were mostly praised for simplicity, glove usability, and feel, though one reviewer wanted a five-button layout.

Physical buttons were usually praised for workout control, though one reviewer found button integration imperfect in menus.

Everyday heart-rate tracking was described as close enough for general health use, separate from weaker sports HR results.

Health tracking accuracy was only broadly judged in a few reviews and was generally acceptable, though algorithmic metrics remained mixed.

The user interface was generally considered easy or intuitive, despite some lag-related caveats.

User interface feedback ranged from excellent and intuitive to overwhelming, depending on reviewer tolerance for feature density.

Calorie tracking was praised in one review for producing more realistic results than another tested watch.

Calorie tracking was only directly evaluated once, where one reviewer said calorie burn aligned closely with reference watches.

Wellness insights were supported by positive HRV feedback as a useful health and readiness tool.

Wellness insights were useful in breadth but uneven in trustworthiness, especially where readiness and sleep metrics fed advice.

Charging convenience was mixed because the magnetic charger was easy to attach, but the proprietary cable frustrated another reviewer.

Charging convenience was mixed: reviewers liked the small USB-C puck or magnetic dock, but disliked needing extra cables or a proprietary puck.

Water resistance had limited but positive evidence from one review saying it was suitable for ocean or pool use.

Water resistance was positively judged for swimming, weather, freediving, or pressure testing, with safety caveats separated under safety features.

Fitness prediction accuracy was mixed, with one reviewer finding race estimates overly ambitious.

Fitness tracking accuracy was mixed: basic GPS workouts were strong, while strength reps, elevation, and some advanced metrics had issues.

Customization was praised for watch-face, shortcut, and mode flexibility.

Customization was a strength, with data pages, maps, settings, watch faces, and activity screens praised across reviews.

Workout variety was a strength, with reviewers highlighting broad sport-mode support and a large set of activity profiles.

Workout variety was consistently praised as enormous, sometimes excessive, and a major part of the watch’s appeal.

Stress and resource tracking received positive long-term feedback when one reviewer said it matched how they felt.

Stress-related HRV data was judged comparable in one review, but this area had limited direct evaluation.

Auto-detection was criticized as unreliable, with one reviewer disabling it after false activity recordings.

Call handling was a clear limitation because the watch lacks a speaker, preventing normal wrist calls.

Privacy controls were praised for offering cloud-storage choices, delete options, and alternate activity backup paths.

ECG was criticized by omission in a smartwatch-feature comparison because reviewers noted the Vertical lacks ECG functionality.

Music controls were present and useful for phone playback, but not a standout feature.

Pairing reliability was mixed, with working accessories but reported gaps for power meters, footpods, and easier Garmin/Coros pairing.

Size options were a weakness because the watch mostly comes as one large body that does not suit every wrist.

Step counting was only directly judged once, where it stayed close to a Garmin comparison.

Voice assistant quality was mixed: some reviewers loved the AI controls, while others found it flaky or easily confused.

Voice memos were praised by reviewers who used them for quick ideas or on-the-fly notes.