Comparison

SKI Map 3D vs U

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SKI Map 3D

Features
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This APP is a ski‑terrain map software. You can check snow‑resort landforms and plan your skiing routes easily. 这款 APP 是一款滑雪地形地图软件,助你清晰查看雪场地形地貌,规划滑行路线,畅滑无忧。

About

U

Features
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U-Dive is an Apple Watch companion for freediving and snorkel training. Put on your watch, get in the water — it handles the rest. ◆ On Apple Watch • Automatic submersion & dive detection — recording starts hands-free • Live depth and water temperature (depth display capped at 6 m in this release) • Continuous heart-rate recording during dives — watch your mammalian dive reflex • Surface-interval timer with haptic surfacing alert • Custom depth alerts with haptic feedback • Personal max-depth record notifications • GPS entry/exit coordinates for every dive • Action Button support: start a session, flag a dive, review history • Auto Water Lock — long-press the crown to end & save • Built-in dive simulator to try the full flow on dry land ◆ On iPhone • Dive-spot map with favorites, notes and custom icons • Import Google My Maps layers (KML) • Paste a Google Maps share link to create a spot • Full dive log: depth profile, heart rate, duration and coordinates • Share and export your dives ◆ About Lite This release uses Apple's shallow-depth API: depth display is capped at 6 m, while time, heart rate and GPS keep recording beyond it. A full-depth version is in progress. ◆ Requirements • Depth and auto dive detection require an Apple Watch Ultra (depth gauge) • Other Apple Watch models work in manual mode (HR, GPS, timers, log) • The iPhone app manages spots and logs; the watch app runs independently ◆ Safety This app is not a dive computer and must not be used for dive safety or decompression decisions. Not for scuba diving. Freediving is dangerous — never dive alone, follow one-up-one-down, and get certified training.

Screenshots

SKI Map 3D4 screens
U3 screens

Verdict

The call

The clearest difference is update cadence: SKI Map 3D at every 4 days against U's every 2 weeks. SKI Map 3D also leads on iOS requirement (18.6 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SKI Map 3D ships an update every 4 days, U every 2 weeks. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 4 level
SKI Map 3D versus U: the parameters behind the verdict, then further details
ParameterSKI Map 3DU
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS18.6 — better26.4
Further details — not scored
Size38 MB10 MB
Age rating4+4+
Developer梁 严Yao YungTai

In-app purchases

None

SKI Map 3D

No in-app purchases

None

U

No in-app purchases

Questions

Is SKI Map 3D free?
SKI Map 3D is free to download, with no in-app purchases.
Is U free?
U is free to download, with no in-app purchases.
Do SKI Map 3D or U have ads?
Neither SKI Map 3D nor U shows ads.
Which is updated more often, SKI Map 3D or U?
SKI Map 3D ships an update every 4 days, and U every 2 weeks. Most recently, SKI Map 3D was updated on October 10, 2026 and U on October 16, 2026.

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