Corner Calculus vs SnoTel Mapper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Corner Calculus
This professional tool simplifies the calculation of corner miter joints for woodworking projects. It accurately determines edge angles and dimensions for various joint configurations, including corner rounding with a specified radius.
- Miter joint calculation
- Edge angle and dimension calculation
- Corner rounding with radius
- Supports various joint configurations
- Professional woodworking tool
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Application for calculating corner miter joints (connection of parts with beveled butts). This professional tool is indispensable for joinery or carpentry work. The miter joint is extensively used in woodworking in making of boxes, doors, cabinets, etc. Calculating a butted joints is very complicated operation. But not for that application! Calculate exact edge angles and dimensions of parts for various joint configurations. You can set the angle between the sides, the slope of each side. In addition, obtain the dimensions of the intermediate segments for a perfect corner rounding, by specifying the rounding radius. Use this app to take your woodworking to the next level. Surprise yourself by creating complicated things with the amazing carpenter tool - Corner Calculus!
SnoTel Mapper
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SnoTel Mapper puts real-time snow data in your pocket — 900+ USDA SNOTEL stations across the western United States, plus British Columbia snow pillows. Track snow conditions, avalanche forecasts, terrain, and weather for safer backcountry trips. Built for skiers, snowboarders, snowshoers, winter hikers, and anyone who needs accurate snowpack information. Free Features: • Maps of SNOTEL, SNOW, and SCAN sites, plus BC Automated Snow Weather Stations • Current and historical snow depth, with averages and last-year comparisons • Temperature and precipitation • Avalanche forecast overlays with current danger ratings • Terrain overlays: aspect, hillshade, and slope • Unlimited favorites with offline caching • Charts of snow depth trends, and shareable station cards • Light, dark, and Neon themes; metric or imperial units • Apple Watch: top 3 favorites with depth, temperature, and 24-hour change • Offline access when you are out of cell service Pro Features: • Hourly data instead of daily summaries • Point forecasts on each station, or long-press the map (NOAA in the US, Canada HRDPS for BC) • Save up to 10 weather spots and reopen their forecasts • Morning Brief: compare your top 3 favorites, with a daily notification at a time you choose • Snowfall Watch: flag favorites that gain an amount you set over 8, 12, or 24 hours • Storm totals: 24/48/72-hour depth change, plus daily high and low temperatures • Snowfall prediction gauges • Multi-model forecasts for precipitation and temperature • Nearby webcams to check ground conditions Reorder favorites, export a backup, and share a conditions card. Map clustering keeps hundreds of stations easy to browse. Your first three favorites refresh hourly and stay on Apple Watch. Perfect for backcountry skiers and snowboarders, winter campers, weather enthusiasts, and guides who want official station data before they leave the trailhead. • Coverage: 900+ SNOTEL stations, plus SNOW, SCAN, and BC snow pillows • Official networks used by avalanche forecasters and water managers • Smart caching for fast loads and offline use • No personal data collection. Location only centers the map and is never stored • Regular updates shaped by community feedback Data from USDA NRCS SNOTEL, BC Snow Survey / River Forecast Centre (ASWS), NOAA, Environment and Climate Change Canada (HRDPS), USGS 3DEP terrain, and regional avalanche centers via Avalanche.org. Plan a tour with snow depth and avalanche danger, check a trail before you go, compare this season with last year, and follow storms as they add up. SAFETY NOTICE Data from USDA NRCS, British Columbia, and other sources is for information only. Availability and accuracy vary. Check official forecasts from regional avalanche centers and use your own judgment. The developers are not responsible for decisions made from this app. Pro features require a subscription. Terms apply. Privacy Policy: https://psithurismlabs.com/privacy.html Terms of Service: https://psithurismlabs.com/terms.html EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Corner Calculus at none against SnoTel Mapper's 2. Corner Calculus also leads on update cadence (weekly vs every 2 months) and iOS requirement (12.0 vs 15.6). On price, ads 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
Corner Calculus costs $1.99 and SnoTel Mapper $2.49 up front. SnoTel Mapper sells 2 in-app purchases, starting at $2.99 per month. Corner Calculus asks for nothing beyond the download.
Corner Calculus ships an update weekly, SnoTel Mapper every 2 months. Both last shipped on October 24, 2026.
| Parameter | Corner Calculus | SnoTel Mapper |
|---|---|---|
| Price | $1.99 — better | $2.49 |
| Rating | 4.3 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Weekly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 12 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Sergey Kirichenko | Jason Flaherty |
In-app purchases
Corner Calculus
No in-app purchases
SnoTel Mapper
- Premium Monthly Subscription7 Days trial$2.991 Month
- Premium Yearly Subscription$24.991 Year





