NORTHING
VER 1.0 // GREAT BRITAIN // SUMMIT VERIFICATION
[INSTRUMENT] Northing is a summit verification app for Great Britain. It audits raw GPS activity data from Strava, GPX, and FIT files and verifies arrival at Munros, Wainwrights, and Marilyns. Coordinate tolerance: 200 metres against Ordnance Survey summit positions. Private by default. No social feed.
00. How Summit Verification Works
[01 CONNECT]
Link your Strava account or upload a GPX/FIT file from your device. All sources treated equally.
[02 VERIFY]
Northing cross-references your raw GPS coordinates against Ordnance Survey summit positions. Tolerance: 200 metres horizontal. Elevation gain from barometric pressure where available.
[03 RECORD]
Verified summits are logged to your personal ledger. No notifications. No praise. A state change in your record.
01. Verification
- [AUDIT] Activity Ingestion. Northing ingests activity data post-hoc from Strava, GPX, or FIT files. Raw coordinate samples and barometric pressure data are retained unsmoothed.
- [FIX] Summit Verification. Each activity is cross-referenced against summit coordinates. A summit is marked as verified when a GPS sample falls within 200 metres of the Ordnance Survey position.
- [GAIN] Elevation Calculation. Vertical gain is calculated from atmospheric pressure samples, not GPS altitude. This rejects consumer-grade GPS vertical estimation and reduces atmospheric drift error.
02. Operating Rules
- [RULE] Agency. Northing does not recommend routes, assess difficulty, or score conditions. The user makes all decisions. The app records the result.
- [RULE] Privacy. Private by default. No social feed. No data selling. Encrypted in transit (TLS 1.3) and at rest (AES-256). You own your data.
- [RULE] Integrity. No motivational copy in the app. No streaks. No badges. Effort is recorded without editorialisation.
03. Database
282
[MUNROS]
Scottish peaks above 3,000 ft (914.4m). The complete Munro list as maintained by the Scottish Mountaineering Club.
214
[WAINWRIGHTS]
The fells of the English Lake District as catalogued by Alfred Wainwright in his seven Pictorial Guides.
1,550
[MARILYNS]
Hills across Great Britain with a minimum 150-metre topographic prominence. The comprehensive British hills database.
04. Access Tiers
Registry
Free Access
Initial Window
1-month historical synchronisation from first sync baseline
Current Records
Real-time synchronisation for all future ledger entries
Archive
Annual Access — 7-day free trial, then auto-renews at £24.99/year unless cancelled
Historical Coverage
Full historical synchronisation for eligible activity history
Current Records
Real-time synchronisation for all future ledger entries
Reversion Policy
If annual access lapses, visibility reverts to free-window policy
Start 7-Day Free Trial
7-day free trial for eligible new subscribers. After trial, subscription auto-renews at the standard price of £24.99/year unless cancelled.
Download on the App Store →05. Download
Scan to download
Northing is available on the App Store for iPhone. Registry access is free. Archive requires a subscription (£24.99/year) with a 7-day free trial.
iOS 17.0 or later. Great Britain only.
06. Scope
- [GEOGRAPHY] Restricted to Great Britain: England, Scotland, and Wales. Ireland and Northern Ireland are currently excluded.
- [PLATFORM] iOS. iPhone only.
- [TOLERANCE] Coordinate verification mandates a 200-metre horizontal tolerance of the target summit. Fixed. Not adjustable.
- [INPUT] Strava activity sync. GPX file upload. FIT file upload. All sources treated equally.
07. Frequently Asked Questions
What is Northing?
Northing is a summit verification app for Great Britain. It ingests GPS activity data from Strava, GPX, or FIT files and verifies whether you reached the summit of a Munro, Wainwright, or Marilyn. Verification tolerance: 200 metres against Ordnance Survey summit positions.
Does Northing work with Strava?
Yes. Connect your Strava account and Northing imports your completed activities for summit verification. Post-hoc only — Northing does not track you in real time.
What peak lists are supported?
282 Munros (Scotland, peaks above 3,000 ft), 214 Wainwrights (English Lake District fells), and 1,550 Marilyns (Great Britain, hills with 150m+ prominence).
Is Northing private?
Private by default. No social feed. No public profile. No leaderboard. Data encrypted in transit (TLS 1.3) and at rest (AES-256). You own your data.
How much does Northing cost?
Registry is free (summit database access). Archive is £24.99/year with a 7-day free trial (full verification ledger, activity ingestion, Strava sync, GPX/FIT import). Payment via Apple In-App Purchase.
Is Northing a navigation app?
No. Northing does not provide routes, directions, or navigation of any kind. It verifies where you have been, not where you should go. All route decisions are yours.
Why is the verification tolerance 200 metres?
Summit coordinates represent a summit area, not a point. The 200-metre tolerance accounts for GPS accuracy variation and the physical reality that summits are approachable from multiple angles. The tolerance is fixed and not adjustable.
Does Northing cover Ireland?
No. Great Britain only — England, Scotland, and Wales. Ireland and Northern Ireland are currently excluded.