# Avyline - Ski Tour Planner — Avalanche terrain, plan ahead

> Offline 3D backcountry ski tour planner with avalanche terrain analysis. (iPhone/iPad app by 国刚 赵.)

- Source: https://appshunter.io/ios/app/avyline-ski-tour-planner/id6801948006 (this page in markdown: same URL + `.md`)
- Developer: [国刚 赵](https://appshunter.io/developer/900867272)
- Category: Navigation, Sports
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 15 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-08-25
- Data updated: 2026-11-06
- Monetization: freemium

## What is Avyline?

Avyline is an offline 3D terrain planner for backcountry skiing. Draw your line, see how steep it gets and where the steep ground lies, compare alternatives and export the plan — all with zero cell signal. Estimated slope, steep ground ahead and the official forecast, on one map.

PLAN YOUR TOUR • Draw a route and read its elevation profile, the share of its length on ground ≥30° (from elevation data) and estimated time (a range, never a single number). • Corridor analysis breaks the line down: continuous steep sections, overhead steep terrain, potential terrain-trap indicators, aspect rose and elevation-band distribution — terrain facts only, never a safe/unsafe verdict. • Compare two routes side by side on the same facts. Add backup routes, typed waypoints (observe / decide / turn around) and No-Go zones. • Simulate sun and shade by date (free). Export the plan as a PDF or image card with map attribution and a timestamp footer (Pro). • Reuse a plan as a template for a new date (forecast and sun reload). Import routes from other tools — GPX free, plus KML, KMZ and FIT with Pro. • Browse curated classic lines and community ski tours and load one into the planner (free where regions have them).

FREE TERRAIN BASE, ALWAYS ON • Slope readout estimates the slope around your position from offline elevation data; turn alerts on (off by default) for a one-time warning when you enter terrain steeper than your threshold. • Look-ahead check samples the corridor ahead and flags steep ground before you reach it — it does not detect avalanches, obstacles or snow. • Steep-ground shading colours terrain at or above 30°; when an official forecast exists, its regional band rating only sets the shade strength — an area input, not a per-slope verdict. • Slope alerts, look-ahead check, steep-ground shading, the slope map, terrain exposure and official forecasts are free forever — never paywalled.

OFFICIAL FORECASTS, SHOWN HONESTLY • Avalanche danger ratings from official public warning services (avalanche.org member centers, SLF and EAWS partners), broken out by elevation band — in the regions those services cover. • Ratings expire automatically at their validity end. "No rating" is its own state — never shown as "low danger." • Every forecast shows its source and publication time.

TRUE OFFLINE 3D • Each region (~5–40 MB, sized to area and resolution) packs high-resolution terrain, aerial/satellite imagery, contours, hillshade and place names — downloaded once, then usable with no signal at all. • Slope, aspect, contours and shaded relief rendered at 60 fps by an in-house engine. • The Terrain Exposure layer classifies avalanche terrain into three in-house grades (1–3), computed on-device and honestly labelled as not an official rating. • Search peaks, passes and huts; save your own waypoints.

FREE VS PRO • Free: one downloaded region, the entire safety base above, every map layer, sun & shade simulation, curated classic lines in the planner, and a taste of planning — draw one route with its profile. Safety is never paywalled. • Pro (a single annual subscription, $4.99/year): the full planning toolkit — corridor analysis, A/B route comparison, backup routes with typed waypoints and No-Go zones, plan-card export (PDF/image), templates, KML/KMZ/FIT import, unlimited saved plans and every supported region, fully offline.

IMPORTANT Avyline is a decision-support tool, not a substitute for formal avalanche training, a current official forecast, beacon/shovel/probe or your own judgment. Corridor analysis and profiles report terrain facts only — they never assess snow stability or issue a safe/unsafe verdict. Terrain angles come from digital elevation data with finite accuracy, which the app discloses openly. A low ≥30° share is not low risk: overhead slopes and runout zones can lie outside the corridor. Travel in avalanche terrain at your own risk.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Offline 3D terrain planning
- Avalanche terrain exposure analysis
- Route comparison tool
- Official avalanche forecasts
- Slope and look-ahead radar alerts
- Sun/shade simulation
- GPX/KML/FIT route import

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Avyline Pro Annual（≤30） | $4.99 | per year |


## Is Avyline safe?

Not enough ratings yet to assess Avyline.

## Is Avyline legit?

Avyline - Ski Tour Planner appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Avyline is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about Avyline

### What is Avyline?

Avyline is an offline 3D terrain planner designed for backcountry skiing. It helps users plan routes, analyze avalanche terrain, and access official forecasts without needing a cell signal.

### Is Avyline free to use?

Yes, Avyline offers a free version that includes one downloaded region, essential safety features like SlopeGuard and hazard highlighting, and basic route planning. Advanced planning tools require a Pro subscription.

### What does Avyline Pro offer?

Avyline Pro, available as an annual subscription, unlocks the full planning toolkit. This includes corridor analysis, side-by-side route comparison, backup routes, typed waypoints, and the ability to load curated classic lines and community tours.

### How does Avyline handle avalanche forecasts?

Avyline displays official avalanche danger ratings from public warning services, broken down by elevation band where available. Forecasts are shown with their source and publication time, and ratings expire automatically.

### Can I use Avyline without an internet connection?

Yes, Avyline is designed for true offline use. You can download regions containing high-resolution terrain, imagery, and other map data once, and use them without any cell signal.

### What devices does Avyline support?

Based on the provided data, Avyline currently supports iPhones. The app was released on August 25, 2026, and its latest version is 2.1.0, last updated on October 15, 2026.

### Does Avyline have ads?

No, Avyline does not have advertisements. The application is ad-free, ensuring an uninterrupted user experience while planning backcountry tours.

### What is the age rating for Avyline?

Avyline has an age rating of 4+. This indicates it is suitable for a wide range of users, though its primary audience is backcountry skiers who require advanced planning features.

## Version history (last 5 releases)

### 2.5.0 — 2026-10-31

• Your plans now live with their region — open a region to find, search, archive or delete them.
• Tap the share of the route on ≥30° ground, or a steep section, and that stretch lights up on the map.
• A heading cone shows which way you are facing while you read the terrain.
• All map layers, sun & shade, classic lines and forecast alerts are now free.

### 2.1.0 — 2026-10-15

Bug fixes and stability improvements.

### 2.0.1 — 2026-10-10

- 2.0 turns Avyline into a full backcountry tour planner on offline 3D terrain.
- Draw your route and see how steep it gets and how much of it crosses avalanche terrain.
- Add backup lines and compare two routes side by side.
- Check sun & shade by date, and export your plan as a PDF or image card.
- Pro is a single annual plan; every safety feature stays free.

### 2.0.0 — 2026-10-05

• 2.0 turns Avyline into a full backcountry tour planner on offline 3D terrain.
• Plan end to end: draw a route, add typed waypoints (observe / decide / turn around), backup lines and No-Go zones.
• New corridor analysis — overhead steep terrain, continuous steep sections, terrain traps, aspect rose and elevation bands along your line (terrain facts, not a verdict).
• New A/B compare: two routes side by side on the same facts.
• New sun & shade simulation with a date picker; export plan cards as PDF or image (attributed and timestamped).
• New: plan templates, KML/KMZ/FIT import, tree-cover layer and forecast-update alerts for saved regions.
• Avyline Pro is now a single annual plan ($4.99/yr) unlocking the full toolkit. All safety features stay free forever.

### 1.2.0 — 2026-09-08

- Accuracy & honesty: slope readings now show a ± margin that also accounts for the elevation data's resolution, so coarser data is never shown as more precise than finer data.
- Slope alerts are now opt-in (off by default), with an adjustable steepness threshold and a permanent off switch.
- Cleaner data: the ski-tour library was pruned of non-touring loops with corrected route lengths, and the region catalog is curated to 240 backcountry areas.
- Visual refinements: clearer satellite imagery, graded hazard highlighting, and Terrain Exposure relabeled to in-house grades 1–3.

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All apps by 国刚 赵: https://appshunter.io/developer/900867272

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*