Topography vs WGS84
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Topography
This tool helps civil engineers, architects, and surveyors measure surface areas and convert coordinates. It allows users to calculate polygon areas, convert coordinates to UTM EGSA87 Datum, and export measurements in DXF, KML, or TXT formats via email.
- Convert coordinates to UTM EGSA87 Datum
- Calculate polygon area in square meters
- Export measurements in DXF format
- Export measurements in KML format
- Export measurements in TXT format
- Input coordinates manually
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The application is very useful to Civil Engineers, Architects, Surveyors, and those interested in measuring a surface area or converting its coordinates to UTM EGSA87. This tool enables users to: 1. Convert the coordinates (x,y) to UTM EGSA87 Datum 2. Calculate the area of a polygon in square meters (m2) 3. Send the above measurements by e-mail in [dxf] file format. The dxf file can be opened in a MAC or a PC by any drawing application like Autocad. 4. Send measurements by e-mail in [kml] file format. The kml file can be opened in a MAC or a PC or iPhone by GoogleEarth application. 5. Send measurements by e-mail in [TXT] file format. The text file contains coordinates either in EGSA87 Datum or Latitude and Longitude in decimal degrees or UTM coordinates. The measurements mentioned above can be provided not only by placing the iPhone in each border of a surface area, but also from distance (when users are on their bed or their sofa). Users may also have their final measurements by entering the coordinates either in EGSA87 Datum or Latitude and Longitude in decimal degrees.
WGS84
This app measures coordinates in WGS84 format, offering both decimal degrees and degrees-minutes-seconds. It allows users to export data as CSV and attach photos, videos, or voice notes to measurements.
- WGS84 coordinate measurement
- Decimal degrees format
- Degrees-minutes-seconds format
- CSV data export
- Attach photos, videos, voice records
- Download media via iTunes
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This application is primary used to measure coordinates of WGS84. It provided two different format of coordinates - decimal degrees and degrees-minutes-seconds. All measure data could be exported as a csv file for post process. In addition, users could also add photos, videos and voice records to the measure data, and the photos, videos and voice records could be downloaded through iTunes.
Screenshots
Verdict
The clearest difference is review sentiment: Topography at 59% against WGS84's 0%. WGS84's advantage is price ($1.99 vs $3.99) and iOS requirement (13.0 vs 16.1). On update cadence, 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
Topography costs $3.99 and WGS84 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.
| Parameter | Topography | WGS84 |
|---|---|---|
| Price | $3.99 | $1.99 — better |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 58.6% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Georgios Graikousis | HUNG HSUN LIN |
Customer experience
Topography
WGS84
In-app purchases
Topography
No in-app purchases
WGS84
No in-app purchases
