SailScan vs Norwegian 4x4 Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SailScan
This app uses your phone's camera to analyze sail shape by identifying draft stripes. It provides detailed measurements like camber, draft position, entry, exit, and twist for each stripe. You can also log environmental data and compare scans over time.
- Measures camber, draft, and twist
- Identifies draft stripes from photos
- Logs wind speed, angle, boat speed, heel, and GPS
- Compares tack-to-tack and day-to-day scans
- Generates shareable reports
- Exports data as CSV
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SailScan measures sail shape from a photo. Point your phone at the sail and it finds the draft stripes and gives you camber, draft position, entry, exit and twist for every stripe. The stripes are traced on the image so you can see exactly what was measured. Built on a vision model trained on real racing sails, with the most accurate stripe reading we have ever shipped. Log wind speed, wind angle, boat speed, heel and GPS with each scan. Save scans, compare tack to tack and day to day, share a report, export the CSV, or post to the SailScan feed. Mainsails and jibs. RC boats to super maxis and everything in between. A training tool. Check your class rules before using it while racing. Free. Open to everyone. sailscanapp.com
Norwegian 4x4 Timer
This free app guides users through the Norwegian 4x4 interval training protocol to improve cardio and VO2 Max. It supports various cardio activities and allows for customization of interval durations and repetitions.
- Norwegian 4x4 Protocol guidance
- Customizable interval durations
- Adjustable number of intervals
- Supports various cardio activities
- VO2 Max improvement focus
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Norwegian 4x4 Timer is a simple, free app to guide you through intervals for the Norwegian 4x4 Protocol. It can also be customized to adjust interval durations and number. Use it to amp up your cardio and VO2 Max. Whether it's running, rowing, jump rope, cycling, or other forms of cardio training, this is your trusted companion to know when to push yourself and when to rest in your interval workout.
Screenshots
Verdict
The clearest difference is update cadence: SailScan at daily against Norwegian 4x4 Timer's monthly. SailScan also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for SailScan against 5.0 for Norwegian 4x4 Timer. Both are backed by a comparable volume of ratings — 3 and 4 respectively.
SailScan ships an update daily, Norwegian 4x4 Timer monthly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | SailScan | Norwegian 4x4 Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (4 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 | 4 — better |
| Update frequency | Daily — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 34 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Sail Scan LLC | No Translation Layer LLC |
Customer experience
SailScan
Norwegian 4x4 Timer
In-app purchases
SailScan
No in-app purchases
Norwegian 4x4 Timer
No in-app purchases
Questions
Is SailScan free?
Is Norwegian 4x4 Timer free?
Which has better reviews, SailScan or Norwegian 4x4 Timer?
Do SailScan or Norwegian 4x4 Timer have ads?
Which is updated more often, SailScan or Norwegian 4x4 Timer?
Other comparisons
