Local Scale Factor vs ConcreteDNA
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)
ConcreteDNA
Monitor concrete strength and temperature in real-time with sensor data sent directly to the cloud. Access live site data from anywhere, receive instant alerts, and generate QA reports for simplified paperwork. Supports collection from Converge Signal sensors.
- Live concrete strength feedback
- Instant action alerts
- Cloud access for teams
- Temperature monitoring
- QA report generation
- Converge Signal sensor support
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Converge sensors generate realtime strength and temperature measurements of concrete, which our system returns directly to the cloud, meaning you always have access to live data about your site, anytime, anywhere. The app now supports collection of measurements from Converge Signal sensors. - Live feedback on concrete strength - Instant alerts to help you take action precisely when it's needed - Cloud access, for you and your whole team from the site office, or HQ - Temperature monitoring to help you stay in spec. - QA reports to simplify paperwork
Screenshots
Verdict
The clearest difference is update cadence: ConcreteDNA at fortnightly against Local Scale Factor's every 2 months. Local Scale Factor's advantage is monetization model (free vs ad-supported) and iOS requirement (10.3 vs 16.6). On price, ads, in-app purchases and device support 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, ConcreteDNA fortnightly. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.
| Parameter | Local Scale Factor | ConcreteDNA |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 4 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.3 — better | 16.6 |
| Further details — not scored | ||
| Size | 65 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | NRG Surveys Ltd | Converge |
Customer experience
Local Scale Factor
ConcreteDNA
In-app purchases
Local Scale Factor
No in-app purchases
ConcreteDNA
No in-app purchases
Questions
Is Local Scale Factor free?
Is ConcreteDNA free?
Do Local Scale Factor or ConcreteDNA have ads?
Which is updated more often, Local Scale Factor or ConcreteDNA?
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