Local Scale Factor vs Degree Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Local Scale Factor
This tool calculates local scale factors and Cartesian coordinates from WGS84 GPS positions. It supports numerous local grid transformations and can convert between local postcodes and geodetic positions. It also offers map navigation to selected coordinates.
- Local scale factor calculation
- Cartesian coordinate conversion
- WGS84 GPS position input
- Local grid transformations
- Postcode to geodetic position conversion
- Map navigation
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For professional surveyors and geodesists who need to know the local scale factor and Cartesian coordinates based on WGS84 GPS positions Hundreds of local grid transformations built in. A full list of available transformations can be found at https://www.nrgsurveys.co.uk/wp-content/uploads/transformations.txt Converts latitude and longitude using local ellipsoid parameters and Helmert 7 step transformations As a bonus it converts local postcodes to geodetic positions and vice versa Open Maps navigation to the selected coordinates (If available)
Degree Calculator
This utility app performs basic addition and subtraction of degrees and minutes, specifically designed for celestial navigation. It uses the DD°MM.F' notation common in sight reduction and almanacs, offering a focused tool for practice and verification.
- Degrees and minutes addition/subtraction
- DD°MM.F' notation support
- Celestial navigation focus
- Practice and double-checking tool
- Simple, single-purpose design
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Calculator for celestial navigation (CN). Supports just the basic add/subtract of degrees and minutes using the typical notation just in celestial navigation. Most calculators support degrees/minutes-as-fraction (26°23.5'). But they show results in degrees/minutes/seconds (26°23'30". For celestial navigation, sight reduction using HO249 tables and almanacs uses DD°MM.F'. This calculator is aimed specifically at that use case and thus only operates with DD°MM.F' and not with DD°MM'SS" While navigators should do this math by hand, using a calculator while practicing, learning or to double check is useful. This does just that, no more.
Screenshots
Verdict
The clearest difference is update cadence: Local Scale Factor at every 2 months against Degree Calculator's every 26 months. Local Scale Factor also leads on review sentiment (100% vs 86%) and iOS requirement (10.3 vs 16.0). On price, ads, in-app purchases and monetization model 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.
Local Scale Factor ships an update every 2 months, Degree Calculator every 26 months. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.
| Parameter | Local Scale Factor | Degree Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 85.7% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.3 — better | 16.0 |
| Further details — not scored | ||
| Size | 65 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | NRG Surveys Ltd | Eskil Olsen |
Customer experience
Local Scale Factor
Degree Calculator
In-app purchases
Local Scale Factor
No in-app purchases
Degree Calculator
No in-app purchases
Questions
Is Local Scale Factor free?
Is Degree Calculator free?
Do Local Scale Factor or Degree Calculator have ads?
Which is updated more often, Local Scale Factor or Degree Calculator?
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