TrailForge: Trail Run Training

Ultra Race Plans, Pacing, Fuel

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Train using vert, distance or time on feet. Plan race day: terrain-aware pacing, weather along your course, and fueling. Garmin & Strava sync. 2-week free trial. TrailForge is the planning app for trail and ultra runners who coach themselves. Plan your training in the units the sport actually uses — vertical gain and time on feet — then turn the same preparation into a race-day plan with pacing, weather and fuelling for your course. Most running platforms were built for the road: they measure your week in flat kilometres and treat elevation as an afterthought. TrailForge plans in vert and hours from the start. PLAN YOUR SEASON • Build multi-week training plans on your phone — no desktop required • Set weekly targets in vertical gain and time on feet, not just distance • A full structured-workout editor: intervals, repeats, ramps, hill blocks • Plan a backyard ultra with lap-based projections SEE PLANNED VS ACTUAL • Completed runs sync back and match themselves to the planned session — scored on date, distance and route, always yours to override • Watch each week fill in: planned vert against climbed vert, planned hours against hours on feet PLAN RACE DAY • Import the course (GPX) and get terrain-aware splits that respect the climbing • Weather projected along the course — the forecast for where you'll be when you get there, not for the start line • A fuelling plan with carbs, fluids and sodium spaced across the race, aid station by aid station FUEL THAT LEARNS • After long efforts, a three-tap check-in: did you follow the plan, how was your gut, how was your energy • Your targets adjust from what actually worked for you — not a generic formula ROUTES • Draw routes that snap to trails, or import GPX • Elevation profile, distance and climbing for every route • Follow your route in the field WORKS WITH YOUR WATCH • Push planned workouts and routes to Garmin • Import completed activities from Garmin or Strava • Splits, grade-adjusted pace, heart-rate zones and elevation for every run • Home Screen and Lock Screen widgets FREE AND PRO Logging, weather, route viewing, single workouts and the post-run fuel check-in are free forever. TrailForge Pro unlocks multi-week plans, race-day plans, personalised fuel targets and long-term stats. TrailForge Pro is an auto-renewable subscription: US $129/year or $14.99/month (prices vary by region), with a 2-week free trial on the annual plan. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; any unused portion of a free trial is forfeited when you purchase. Manage or cancel in Settings > Apple Account > Subscriptions. Privacy Policy: https://trailforge.run/privacy/ Terms of Use (EULA): https://trailforge.run/terms/ Questions or ideas? support@trailforge.run — TrailForge is built by one trail runner in Norway.

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The developer, BYTE-SIZED SYSTEMS AS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Location
    • Contact Info
    • User Content
    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Contact Info
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • BYTE-SIZED SYSTEMS AS
Size
  • 57.2 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 26.0 or later.
  • iPhone
    Requires iOS 26.0 or later.
  • Mac
    Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.0 or later.
Languages
  • English
Age Rating
9+
In-App Purchases
Yes
  • TrailForge Pro Annual $99.99
  • Pro Monthly $12.99
  • Learn More
Copyright
  • © 2026 Byte-sized Systems AS
  • Developer Website
  • Privacy Policy