Trailtime

Trailtime works out how long a walk will take. You describe the route as a series of legs, such as car park to bridge, bridge to hut, hut to summit, and enter the distance, ascent and descent of each one. Trailtime adds everything up and shows when you reach the end of every leg and when you will be back. HOW IT WORKS Choose one of two well-known hill-walking time models. Naismith's rule allows 5 km/h on level ground plus 10 minutes for every 100 m of climbing, with an optional Langmuir correction that speeds up gentle descents and slows down steep ones. Tobler's hiking function calculates a walking speed from the slope of each leg, so steep climbs and steep descents both cost time. A pace factor from 70 to 150 percent adapts either model to your fitness, your pack or your group. Breaks are added automatically: for example 10 minutes after every 50 minutes of walking, or none at all. Set your start time and the timetable shows the clock time at the end of each leg, including the breaks taken so far. Switch on last light, enter the time it gets dark, and Trailtime warns you when the walk would end later and shows the latest start that still gets you back in daylight. FEATURES - Routes of up to 30 legs, in kilometers and meters or miles and feet - Totals for distance, ascent, descent, walking time, breaks and overall time - Elevation profile drawn from your legs, with the arrival time marked at each leg end - Naismith with optional Langmuir correction, or Tobler's hiking function - Pace factor from 70 to 150 percent - Automatic breaks with adjustable interval and length - Start time, arrival time and last light warning with the latest possible start - Up to 30 saved routes; duplicate a route to try a variation - Reverse a route to plan the walk the other way round - Reorder, edit and delete legs at any time - Share a plain-text summary of the plan - 24-hour or 12-hour clock - A built-in guide explaining every rule in plain English The time models are estimates for walking on paths. Rough ground, snow or poor visibility take longer, so always keep a margin before dark. Trailtime has no account and no internet access. Your routes and settings are stored only on your phone, and nothing about you or your walks ever leaves it.

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