GPS Running Watches / COROS VERTIX 2S (50mm) vs COROS APEX 4 (42mm)
COROS VERTIX 2S (50mm) vs COROS APEX 4 (42mm)
COROS APEX 4 (42mm)
Free offline topo maps and a titanium bezel for $429 — with a screen you fight in low light.
Wins overall by 0.3 points
Quick Verdict
The COROS APEX 4 (42mm) wins by 0.3 points, which is not enough to settle it. 118 hours of GPS — as long as you never turn the dual-frequency mode on. Pick on the specs that matter to you, not the overall score.
The COROS VERTIX 2S (50mm) and COROS APEX 4 (42mm) are both closely matched GPS Running Watch models, and the COROS APEX 4 (42mm) is $270 cheaper than the COROS VERTIX 2S (50mm) ($429 vs $699). On Build & Comfort, the COROS APEX 4 (42mm) leads (8.6 vs 6.8/10) — case materials, lens (sapphire vs glass), weight on the wrist and durability ratings.. On Battery Honesty, the COROS APEX 4 (42mm) leads (8.8 vs 7.4/10) — how much of the headline battery claim survives the mode you would actually train in: all-systems plus multiband, always-on display, music playing. The number on the box is almost always the slowest, least accurate mode.. On Navigation & Maps, the COROS VERTIX 2S (50mm) leads (8.4 vs 7.8/10) — real routable offline topographic maps versus a breadcrumb line, plus how painful it is to get maps onto the watch.. Overall, the COROS APEX 4 (42mm) scores 7.9/10 across our 8 scoring categories versus 7.6/10 for the COROS VERTIX 2S (50mm), though the gap is close enough that your specific use case should decide it. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | COROS VERTIX 2S (50mm) | COROS APEX 4 (42mm) |
|---|---|---|
| Price | $699.00 | $429.00 |
| Release Year | 2024 | 2025 |
| Display | 1.4-in 280x280 transflective MIP touchscreen, always-on, sapphire lens | 1.2-in 240x240 3rd-gen transflective MIP, always-on, no AMOLED battery penalty — but DC Rainmaker and Tom's Guide both call it dim indoors and in low light |
| Smartwatch Battery ( days) | Sources conflict: 40 days (COROS spec sheet and the Amazon listing title) vs 36 days (COROS' current vertix2s product page) | 15 |
| Always-On Display Cost | No always-on penalty — MIP is permanently on. This is why the VERTIX 2S posts numbers no AMOLED watch here can approach. | No always-on penalty — the MIP screen is permanently on. (The 46 mm version is rated 24 days smartwatch and 65 h all-systems GPS if you want the bigger numbers.) |
| Battery, Single-Band GPS ( h) | 118✓ | 41 |
| Battery, Multiband GPS ( h) | 43 | Not published by COROS for the 42 mm in any source reviewed here. For reference the 46 mm is rated 65 h all-systems vs 41 h dual-frequency — expect a similar ~35-40% drop. |
| GNSS Bands | All-satellite dual-frequency L1+L5 (GPS, GLONASS, Galileo, BeiDou, QZSS). The three published tiers are 118 h standard GPS, 73 h all-systems and 43 h dual-frequency. | Dual-frequency L1+L5 chipset covering GPS, GLONASS, Galileo, BeiDou and QZSS. DC Rainmaker warns GPS accuracy degrades noticeably when route navigation is running. |
| Onboard Maps | Global offline landscape and topographic maps with turn-by-turn directions, free, stored in 32 GB | Free global offline topographic and landscape maps with street/trail names and POIs, downloaded through the COROS app, plus turn-by-turn on preloaded routes. No ClimbPro equivalent and no automatic rerouting. |
| Music Storage | MP3 playback to Bluetooth headphones from the 32 GB store. No streaming services. | MP3 files only, sideloaded. No streaming services and no phone-music control. |
| Training Platform & Subscription | COROS app and EvoLab are free with no paid tier. COROS' own analytics, not Firstbeat-licensed. | COROS app and EvoLab analytics are entirely free, no subscription tier. COROS' own metrics, not Firstbeat. |
| External Sensor Support | Bluetooth only — no ANT+ | Bluetooth only — no ANT+ at all, which rules out ANT+-only power meters |
| Data Export | Free .FIT/GPX export and auto-sync to Strava, TrainingPeaks, Nike Run Club, Apple Health | Free .FIT/GPX export plus auto-sync to Strava, TrainingPeaks, Apple Health and Health Connect |
| Warranty | 24 months | 24 months |
| Colors | Noon Silver | Black |
Category Scores
GPS Accuracy
The COROS VERTIX 2S (50mm) is marginally ahead, 8.4 to 8.0. A gap this small rarely decides a purchase on its own, though it counts if trace quality in cities and under tree cover — multiband L1+L5 hardware plus what independent testers measured in the real world. is your priority.
Battery Honesty
The COROS APEX 4 (42mm) leads clearly here, 8.8 against 7.4 — a 1.4-point margin on how much of the headline battery claim survives the mode you would actually train in: all-systems plus multiband, always-on display, music playing. The number on the box is almost always the slowest, least accurate mode.. If that is what you are buying for, the COROS VERTIX 2S (50mm) does not close the gap elsewhere.
Training & Recovery
The COROS VERTIX 2S (50mm) is marginally ahead, 8.0 to 7.8. A gap this small rarely decides a purchase on its own, though it counts if depth of load, readiness and recovery analysis, and how much of it is free rather than gated behind a subscription or an extra chest strap. is your priority.
Heart Rate
The COROS VERTIX 2S (50mm) and COROS APEX 4 (42mm) are level here, at 7.4/10 each. optical wrist accuracy during intervals and burst efforts, and whether the watch pairs with ANT+ and/or Bluetooth chest straps as a fix. is not what separates these two — look to the categories where the scores diverge.
Display
The COROS VERTIX 2S (50mm) is marginally ahead, 6.6 to 6.2. A gap this small rarely decides a purchase on its own, though it counts if brightness, resolution and daylight readability, weighing AMOLED sharpness against MIP's always-on-for-free behaviour. is your priority.
Build & Comfort
The COROS APEX 4 (42mm) leads clearly here, 8.6 against 6.8 — a 1.8-point margin on case materials, lens (sapphire vs glass), weight on the wrist and durability ratings.. If that is what you are buying for, the COROS VERTIX 2S (50mm) does not close the gap elsewhere.
Value
The COROS APEX 4 (42mm) leads clearly here, 8.6 against 8.0 — a 0.6-point margin on what the watch delivers per dollar against everything else in the comparison at the moment of purchase.. If that is what you are buying for, the COROS VERTIX 2S (50mm) does not close the gap elsewhere.
Best For
Choose the COROS VERTIX 2S (50mm) if…
- • Navigation & Maps matters most to you — the COROS VERTIX 2S (50mm) scores 8.4/10 here (real routable offline topographic maps versus a breadcrumb line, plus how painful it is to get maps onto the watch.).
- • GPS Accuracy matters most to you — the COROS VERTIX 2S (50mm) scores 8.4/10 here (trace quality in cities and under tree cover — multiband L1+L5 hardware plus what independent testers measured in the real world.).
Choose the COROS APEX 4 (42mm) if…
- • Build & Comfort matters most to you — the COROS APEX 4 (42mm) scores 8.6/10 here (case materials, lens (sapphire vs glass), weight on the wrist and durability ratings.).
- • Battery Honesty matters most to you — the COROS APEX 4 (42mm) scores 8.8/10 here (how much of the headline battery claim survives the mode you would actually train in: all-systems plus multiband, always-on display, music playing. The number on the box is almost always the slowest, least accurate mode.).
- • Value matters most to you — the COROS APEX 4 (42mm) scores 8.6/10 here (what the watch delivers per dollar against everything else in the comparison at the moment of purchase.).
- • You want to spend less — it's $270 cheaper.
Pros & Cons
COROS VERTIX 2S (50mm)
Pros
- +118 h of GPS is the longest single-charge figure in this comparison by a wide margin
- +Free global offline topo maps with turn-by-turn in 32 GB, plus MP3 music storage
- +MIP and sapphire mean the battery claims survive the way you actually use the watch
- +Titanium bezel, 10 ATM rating and a two-year warranty with no subscription anywhere
Cons
- −The famous 118 h is standard single-band GPS. Switch to the dual-frequency mode you bought it for and it is 43 h — a 63% cut
- −COROS' own figures disagree on smartwatch life: the spec sheet says 40 days, the current product page says 36
- −85 g and 50.3 mm wide with a 16.3 mm case — genuinely large on a smaller wrist
- −No ANT+, no NFC payments, no streaming music
- −MIP screen is dim in low light next to the AMOLED watches at this price
COROS APEX 4 (42mm)
Pros
- +Free global offline topo maps with street and trail names at $429 — Garmin charges $749.99 before you get maps
- +Titanium bezel and sapphire glass at a price where rivals use aluminium and Gorilla Glass
- +MIP means the 41 h all-systems figure is what you get, with no always-on display tax
- +Two years of warranty and zero subscriptions anywhere in the platform
Cons
- −COROS does not publish a dual-frequency battery figure for the 42 mm, and dual-frequency is where accuracy actually lives
- −DC Rainmaker measured a real GPS accuracy drop when a route is loaded and navigation is active
- −MIP display is dim indoors and at night compared with every AMOLED rival here
- −No ANT+, no NFC payments and no LED flashlight
- −The depth gauge has no certification and cannot record dives to the app, and there are no dive sport profiles
Shop by Need
FAQs
Is the COROS VERTIX 2S (50mm) or COROS APEX 4 (42mm) better overall?+
Based on our 8-category scoring, the COROS APEX 4 (42mm) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Build & Comfort, the COROS VERTIX 2S (50mm) or the COROS APEX 4 (42mm)?+
The COROS APEX 4 (42mm) scores higher on Build & Comfort (8.6/10 vs 6.8/10) — case materials, lens (sapphire vs glass), weight on the wrist and durability ratings..
Which is better for Battery Honesty, the COROS VERTIX 2S (50mm) or the COROS APEX 4 (42mm)?+
The COROS APEX 4 (42mm) scores higher on Battery Honesty (8.8/10 vs 7.4/10) — how much of the headline battery claim survives the mode you would actually train in: all-systems plus multiband, always-on display, music playing. The number on the box is almost always the slowest, least accurate mode..
Which is better for Navigation & Maps, the COROS VERTIX 2S (50mm) or the COROS APEX 4 (42mm)?+
The COROS VERTIX 2S (50mm) scores higher on Navigation & Maps (8.4/10 vs 7.8/10) — real routable offline topographic maps versus a breadcrumb line, plus how painful it is to get maps onto the watch..
Which is better for Value, the COROS VERTIX 2S (50mm) or the COROS APEX 4 (42mm)?+
The COROS APEX 4 (42mm) scores higher on Value (8.6/10 vs 8.0/10) — what the watch delivers per dollar against everything else in the comparison at the moment of purchase..
Is the COROS VERTIX 2S (50mm) worth the price difference over the COROS APEX 4 (42mm)?+
The COROS APEX 4 (42mm) is the cheaper option at $429 versus $699. Whether the pricier model is "worth it" depends on how much you value its lead in Build & Comfort.
What's the warranty on the COROS VERTIX 2S (50mm) vs the COROS APEX 4 (42mm)?+
The COROS VERTIX 2S (50mm) ships with a 24-month warranty; the COROS APEX 4 (42mm) ships with a 24-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Suunto Vertical 2 (stainless steel) — $599.00
Premium Option
Suunto Race 2 (stainless steel) — $499.00
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.