Comparison

GeoLog Field vs Second Brain

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

Head to head
About

GeoLog Field

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GeoLog Field is an offline-first mobile workspace designed for geological field data collection, mapping and project organization. Record observations, samples, drillholes, drawings, geological map features, sections, measurements and field tracks directly on your device. Keep project records structured during fieldwork and transfer them to office workflows using supported export formats. FIELD DATA COLLECTION • Create geological observations with notes, coordinates and photographs • Record Rock, Soil, Stream and Other samples • Manage drillhole collar, survey, lithology and assay data • Add project-specific custom fields MAP-BASED WORKFLOWS • Place objects using your current GPS position or the map center • Create points, lines, polygons, rectangles, circles and text • Record geological units, structural lines, strike and dip data • Measure distance, bearing, area and perimeter • Create and review geological sections COORDINATES • WGS84 geographic coordinates • UTM based on WGS84 • UTM based on ED50 for supported zones • MGRS coordinate display TRACK RECORDING Record field routes and review track duration, distance and point count. With the required iOS permission, recording can continue while the device is locked. IMPORT AND EXPORT Exchange data using supported formats including GeoLog Field project packages, CSV, XLSX, GeoJSON, KML and GPX. OFFLINE-FIRST Project records are stored locally on the device and remain under your control. An internet connection may be required for online map content, but your saved project data remains available locally. GeoLog Field focuses on the practical tasks geologists need in the field: structured data collection, clear project organization and reliable transfer to the next stage of the workflow. Legal Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://geolog-field-website.web.app/privacy.html

About

Second Brain

Features
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Your brain was built to think, not to remember. SecondBrain turns any spoken thought into a filed, titled, dated record in about three seconds. No folders. No tagging. No deciding where it goes. Just talk. Your second brain does the rest. SUBSCRIPTION REQUIRED Second Brain requires an auto-renewable subscription ($7.99 per week or $29.99 per month). Every feature described below is included with an active subscription - there are no extra purchases. HOW IT WORKS Hold the button and say what's on your mind - in the car, on a walk, halfway out the door. SecondBrain transcribes it, works out what you meant, and files it in the right project with the right due date. Then it buzzes back to confirm. "Call the accountant next Friday about the trust" becomes a task, in Client Work, due Friday. You never picked a project. You never set a date. EVERYTHING IN ONE PLACE • Today - your daily brief, what's due, and what's coming up next • Tasks - organized by project and due date, automatically • Calendar - tasks and events together in one month view • Brain - every note, photo, link and file you've ever captured • Projects - see what's active and what's gone quiet CAPTURE ANYTHING Voice, typed notes, photos, links, files. It all lands in the same place and gets sorted for you. Anything the app isn't confident about goes to a review inbox instead of being filed wrong - so nothing is ever lost or buried in the wrong folder. ASK YOUR BRAIN Get answers from everything you've captured. Your notes stop being a graveyard and start being something you can actually use. PRIVATE BY DESIGN Your content lives in a private database. Nothing is shared, nothing is public, and your notes are never sold or used to train AI models. Export or delete everything at any time. SUBSCRIPTION SecondBrain requires a SecondBrain Pro subscription - $7.99/week or $29.99/month. All features shown, including voice capture, AI filing, the Daily Brief, and instant search, are part of Pro. Payment is charged to your Apple ID; subscriptions auto-renew unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://second-brain.app/terms Privacy Policy: https://second-brain.app/privacy

Screenshots

GeoLog Field4 screens
Second Brain4 screens

Verdict

The call

The clearest difference is iOS requirement: GeoLog Field at 14.0 against Second Brain's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. GeoLog Field sells 2 in-app purchases, starting at $4.99 per month and Second Brain sells 2 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

GeoLog Field ships an update every 4 days, Second Brain every 5 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard1 real difference Ā· 5 level
GeoLog Field versus Second Brain: the parameters behind the verdict, then further details
ParameterGeoLog FieldSecond Brain
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better18.0
Further details — not scored
Size40 MB55 MB
Age rating4+4+
DeveloperBERK AKDAGTerra Innovations

In-app purchases

2 purchases

GeoLog Field

Subscriptions2
  • GeoLog Field Monthly$4.991 Month
  • GeoLog Field Yearly$49.991 Year
2 purchases

Second Brain

Subscriptions2
  • Weekly$7.997 Days
  • Monthly$29.991 Month

Questions

Is GeoLog Field free?
GeoLog Field is free to download, with in-app purchases available.
Is Second Brain free?
Second Brain is free to download, with in-app purchases available.
Do GeoLog Field or Second Brain have ads?
Neither GeoLog Field nor Second Brain shows ads.
Which is updated more often, GeoLog Field or Second Brain?
GeoLog Field ships an update every 4 days, and Second Brain every 5 days. Most recently, GeoLog Field was updated on October 31, 2026 and Second Brain on November 10, 2026.

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