Comparison

StratLogger vs GST[AR]

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

StratLogger

This app helps geologists construct stratigraphic columns digitally, replacing traditional field notebooks. It logs location, links photos to descriptions, and exports data for analysis. Optional tools enhance student learning in the field.

Highlights
  • Construct stratigraphic columns
  • Log sedimentological and stratigraphic information
  • Automatically log geo-location data
  • Link images to lithologic descriptions
  • Export stratigraphic column as JPEG
  • Export layer records to CSV
  • Optional pedagogical tools for student learning
Features
Read full description

StratLogger is an application for use in constructing stratigraphic columns and can serve as a complement to, or replacement for, the traditional paper geology field notebook or stratigraphic column drawing sheets. StratLogger integrates the iPad’s GPS, camera, and data management capabilities to allow geologists to record sedimentological and stratigraphic information for successive layers in a stratigraphic column, automatically log geo-location data, and link images to each layer’s lithologic description.   StratLogger can then export a real-time, app-produced stratigraphic column image as a .jpeg file as well as each of the layer records to formatted .csv files for easy integration into digital drawing and analysis applications.  The lithology photographs are also exported and indexed with the name of the appropriate measured layer. StratLogger integrates an optional set of pedagogical tools, in the form of feedback/hypothesis questions, intended to foster increased student learning while in the field.  The answers to these questions are recorded to track how data acquisition through section relates to how the user interprets the paleoenvironment of the study section.

About

GST[AR]

Explore and visualize geological models in augmented reality. Browse a selection of models, place them on any surface, and interact with them by rotating, scaling, and highlighting features. Share your AR sessions with others for collaborative exploration.

Highlights
  • Browse geological models
  • View models in AR
  • Rotate and scale models
  • Highlight model features
  • Share AR sessions
  • Customize AR settings
  • Add custom model sources
Read full description

GST[AR] allows you to browse, download, view, and share geological models in augmented reality. Browse Browse through available models and their features to find a nice selection to present in AR. Models are retrieved from running instances of GST Web. Don’t worry, there are default sources added already, so you can get started right away. Hint: If you see a „Visit“ button near a section of models, you can tap it to learn more about the institution that provides these models for you! When you select a model, you will find a list of features waiting for you. Make your selection and off you go to the AR view. View As soon as the features are downloaded, you will be able to place them on any horizontal surface in AR. Use gestures or sliders to rotate and scale your model. Tap on individual parts to learn about their name or use the legend to even highlight individual features. Superelevation is available via sliders as well! Share When you have placed a feature selection in AR, you get the option to share your session with others! Use the share button to let other peers join your session, synchronize your worlds and you will be looking at the same model in no time. Changes to the model rotation, scale and location will be synced automatically between all peers in the session. Hold down on a model to place your marker to point towards the feature of interest or highlight a certain feature via the legend for all other peers. Settings and customization Customize your experience by changing a couple of settings. In the settings menu, you will have the possibility to change aspects of scaling, how high the models float above the surface or even enable such cool features like "people occlusion" that make your AR scene even more immersive! Furthermore, if you want to access models from a GST Web instance that is not present in the app, you have the possibility to add endpoints of your own.

Screenshots

GST[AR]4 screens

Verdict

The call

The clearest difference is rating: GST[AR] at 5.0 against StratLogger's 3.5. GST[AR] also leads on update cadence (every 4 months vs every 17 months) and device support (3 vs 1). StratLogger's advantage is iOS requirement (14.5 vs 16.4). On price, ratings volume, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GST[AR] holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

StratLogger ships an update every 17 months, GST[AR] every 4 months. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

Scorecard4 real differences · 5 level
StratLogger versus GST[AR]: the parameters behind the verdict, then further details
ParameterStratLoggerGST[AR]
PriceFreeFree
Rating3.5 (2 ratings)5.0 (1 ratings) — better
Number of ratings2 — better1
Update frequencyEvery 17 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod — better
Requires iOS14.5 — better16.4
Further details — not scored
Size18 MB2 MB
Age rating4+4+
DeveloperLafayetteGiGa infosystems GmbH

In-app purchases

None

StratLogger

No in-app purchases

None

GST[AR]

No in-app purchases

Questions

Is StratLogger free?
StratLogger is free to download, with no in-app purchases.
Is GST[AR] free?
GST[AR] is free to download, with no in-app purchases.
Which has better reviews, StratLogger or GST[AR]?
GST[AR] is rated higher. StratLogger averages 3.5 out of 5 from 2 ratings, while GST[AR] averages 5.0 from 1 ratings.
Do StratLogger or GST[AR] have ads?
Neither StratLogger nor GST[AR] shows ads.
Which is updated more often, StratLogger or GST[AR]?
StratLogger ships an update every 17 months, and GST[AR] every 4 months. Most recently, StratLogger was updated on October 5, 2026 and GST[AR] on September 26, 2026.

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