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Maps · head to head

Geographic Calculator vs SW Maps

Geographic Calculator logo

Geographic Calculator

Maps

Geodetic coordinate conversion and datum transformation for survey, seismic and pipeline data

From
On request
Rated
-
Full reviewWebsite
SW Maps logo

SW Maps

Maps

Free Android GIS data collector that pairs with external RTK GNSS receivers

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only SW Maps has a free tier, so it costs nothing to try first.
  • Each has a real cost: Geographic Calculator no pricing is published for any edition, so buyers negotiate blind and the perpetual versus subscription decision is made without a public list to anchor against.; SW Maps android only. There is no iOS version and no sign of one, which rules it out for organisations that issue iPhones and iPads to field staff.
  • They diverge on capability: Geographic Calculator covers Geodetic parameter database, SW Maps covers Custom feature layers.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Geographic Calculator and SW Maps actually diverge.

Attributes where Geographic Calculator and SW Maps differ
AttributeGeographic CalculatorSW Maps
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWindows, WebAndroid

Identical on both: user rating (Not yet rated), category (Maps).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Geographic Calculator

  • Geodetic parameter database
  • Batch coordinate conversion
  • Datum transformation with accuracy reporting
  • Time-dependent transformations
  • Seismic and well data handling
  • File translation
  • Job files and audit reports
  • GeoCalc and GeoCore SDK

Only in SW Maps

  • Custom feature layers
  • External GNSS support
  • Offline basemaps
  • Geospatial PDF layers
  • Vector import
  • Photo and media capture
  • Export formats
  • NTRIP client

What people use each for

The jobs each tool is most often brought in to do.

Geographic Calculator

  • An offshore survey contractor delivering positions to an operator that requires a documented transformation path and residual accuracy, not just a reprojected filenot SW Maps
  • A pipeline operator reconciling decades of legacy survey data captured in several superseded datums into one current reference framenot SW Maps
  • A seismic processing team converting SEG-P1 navigation and SEG-Y headers between local grids and a global frame without silently losing metresnot SW Maps
  • A software vendor that needs correct geodesy inside its own product and licenses the GeoCalc SDK rather than building and maintaining a transformation cataloguenot SW Maps

SW Maps

  • An NGO or municipal utility mapping water points, pipe networks or road assets on a budget that cannot absorb per-user GIS subscriptionsnot Geographic Calculator
  • A survey team pairing a low-cost RTK receiver with Android tablets to collect centimetre-accurate attributed features without buying field software seatsnot Geographic Calculator
  • A university field course teaching GNSS data collection where every student needs the tool on their own devicenot Geographic Calculator
  • A consultant doing a one-off asset inventory who needs shapefile or GeoPackage output and does not want to start an annual subscription for a three-week jobnot Geographic Calculator

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Geographic Calculator

  • No pricing is published for any edition, so buyers negotiate blind and the perpetual versus subscription decision is made without a public list to anchor against.
  • Licence mobility is tied to being current on maintenance and support, which means a customer who lapses maintenance on a perpetual licence cannot move it to a new machine, effectively turning a perpetual purchase into a recurring cost.
  • It is a transformation engine, not a GIS: there is no meaningful analysis, cartography or editing, so most buyers end up also owning Global Mapper and paying twice for overlapping data handling.
  • The desktop product is Windows only, which is awkward for organisations standardised on macOS or Linux geospatial pipelines despite the cloud option covering only part of the workflow.
  • Blue Marble acquired Avenza in 2026 and is integrating a field data collection product, so engineering attention is spread across a wider portfolio than when Geographic Calculator was one of two products.

SW Maps

  • Android only. There is no iOS version and no sign of one, which rules it out for organisations that issue iPhones and iPads to field staff.
  • There is no back end: no user management, no central project sync, no audit trail. Data lives on the device until someone exports it, and a lost tablet is lost data.
  • No commercial support contract exists, so an organisation with a compliance requirement for vendor support cannot use it for regulated work regardless of technical fit.
  • It is maintained by a small consultancy as a side product of its own project work, so the roadmap follows Softwel’s needs and a feature you depend on may never be prioritised.
  • Form logic is basic compared with dedicated survey platforms: no meaningful skip logic, validation or multi-user assignment, so complex questionnaires quickly outgrow it.

Pricing, plan by plan

Geographic Calculator

On request
  • Geographic Calculator (node-locked)$undefined/year
    • Perpetual or subscription licence
    • Locked to a single machine
    • Annual maintenance and support required to transfer a licence
  • Geographic Calculator (floating)$undefined/year
    • Shared across a team from a licence server
    • Higher price than node-locked
    • Suited to occasional users across several offices
  • GeoCalc SDK$undefined/year
    • Embed the geodetic engine in your own application
    • Developer and runtime licensing
    • Quoted per deployment

SW Maps

Free
  • SW MapsFree
    • All features included
    • External RTK GNSS support
    • Unlimited layers and exports

Which should you pick?

Choose Geographic Calculator if

  • You need geodetic parameter database.
  • You work on Windows, Web.
  • You also want batch coordinate conversion.
Geographic Calculator review

Choose SW Maps if

  • You need custom feature layers.
  • You want to start without paying.
  • You work on Android.
  • You also want external gnss support.
SW Maps review

Questions people ask

Is Geographic Calculator or SW Maps better?
Neither clearly leads. Geographic Calculator starts at On request and SW Maps at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Geographic Calculator or SW Maps?
SW Maps has a free tier; the other does not. Paid plans start at On request for Geographic Calculator and Free for SW Maps.
Does Geographic Calculator or SW Maps run on more platforms?
Geographic Calculator runs on Windows, Web. SW Maps runs on Android.
Can I use SW Maps for free?
Yes. SW Maps has a free tier, so you can try it without paying. Geographic Calculator starts at On request.
What is Geographic Calculator best used for?
Geographic Calculator is most often used for an offshore survey contractor delivering positions to an operator that requires a documented transformation path and residual accuracy, not just a reprojected file, a pipeline operator reconciling decades of legacy survey data captured in several superseded datums into one current reference frame, a seismic processing team converting seg-p1 navigation and seg-y headers between local grids and a global frame without silently losing metres, a software vendor that needs correct geodesy inside its own product and licenses the geocalc sdk rather than building and maintaining a transformation catalogue. Of those, an offshore survey contractor delivering positions to an operator that requires a documented transformation path and residual accuracy, not just a reprojected file and a pipeline operator reconciling decades of legacy survey data captured in several superseded datums into one current reference frame are not what SW Maps is typically brought in for.
What can Geographic Calculator do that SW Maps cannot?
Geographic Calculator covers Geodetic parameter database, Batch coordinate conversion, Datum transformation with accuracy reporting, Time-dependent transformations. SW Maps covers Custom feature layers, External GNSS support, Offline basemaps, Geospatial PDF layers.

Answered from the vendors’ own pages

Geographic Calculator: Is Geographic Calculator the same as Global Mapper?

No. Global Mapper is a general desktop GIS. Geographic Calculator is a dedicated geodetic conversion and datum transformation tool with audit reporting.

SW Maps: Is SW Maps really free?

Yes. It is free with no advertising and no paid tier. There is no subscription and no feature paywall.

Geographic Calculator: Can I still buy a perpetual licence?

Yes. Blue Marble offers perpetual as well as subscription licensing, but a perpetual licence can only be moved between machines while maintenance is current.

SW Maps: Does it support RTK receivers?

Yes, over Bluetooth or USB serial, with NTRIP correction support, antenna height and per-point fix quality recording.

Geographic Calculator: Why not just use QGIS or PROJ?

For routine reprojection they are fine. Geographic Calculator is bought when the transformation path, its accuracy and a documented audit trail must be defensible to a client or regulator.

SW Maps: Is there an iOS version?

No. Android only.

Geographic Calculator: Is there a cloud version?

Yes, Geographic Calculator Cloud provides browser access to the transformation catalogue.

SW Maps: Who maintains it?

Softwel, an engineering consultancy in Kathmandu, Nepal, which built it for its own infrastructure projects.

Geographic Calculator: What changed with the Avenza acquisition?

Blue Marble acquired Avenza Systems in 2026, adding Avenza Maps mobile field data collection to the portfolio. Ask about roadmap commitments before signing a long maintenance term.

SW Maps: Can we get support?

Not contractually. There is no commercial support agreement, which is the main reason organisations with compliance obligations choose a paid alternative.

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