listerCompass vs Thea
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
listerCompass
This app is a stereographic compass designed for structural geologists. It allows users to measure and record foliations and lineations in the field, log descriptions, and export data in various formats, including KML for Google Earth.
- Measure foliations and lineations
- Record traverse information on a map
- Log on-the-fly data descriptions
- Export data in KML and other formats
- Supports UTM and latitude-longitude
- Multiple data format options
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A stereographic compass for use by a structural geologist in the field. The compass readily allows measurement of foliations and lineations, records the information, and allows placemark pins to be dropped on a map to record traverse information. It is designed by a professional structural geologist, and takes into account practical issues: i) measuring upside down under overhangs; ii) measures lineations separately, or foliations, or all together (tap tap on the display to change); iii) allows on the fly data descriptions to be logged; iv) allows export of data, including a KML file that can be dragged onto GoogleEarth to record placemark locations. Records data in a variety of different formats: i) UTM; ii) latitude-longitude. Double tap on the display screen to change. Toggle between the compass screen, the data display, and the map. Autosaves your data and allows export via email, or using iTunes. Use different formats: i) strike, dip and rake if you focus on planes, and lines on planes; ii) yaw, pitch and roll if you focus on the lines themselves; or iii) standard data formats such as dip->dipDirection and plunge->trend to emulate BREITHAUPT COMPASS, or strikeQuadrantDip (e.g., 200NW30) to emulate BRUNTON COMPASS. Annotate place mark pins, or record info in the data log. The listerCompass also provides options for statistical analysis.
Thea
Transform your course materials into interactive study tools with an AI-powered platform. Upload notes, PDFs, or videos to generate flashcards, practice tests, and summaries. Learn efficiently and master your subjects with personalized study plans.
- AI-powered study material transformation
- Interactive flashcards and game modes
- Adaptive learning question generation
- Practice test simulation
- Automatic summarization and guide creation
- Multi-language support
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Feeling overwhelmed by lecture notes, textbook PDFs, and hours of video content? Stop juggling dozens of apps. Meet Thea.study, the all-in-one AI learning platform that transforms your course materials into powerful, interactive study tools in seconds. Reduce stress and save time with Thea, your smart study partner. We help you master your material efficiently, leaving more time for the things you love. Thea offers a powerful set of AI tools designed for personalized learning and better results. UPLOAD ANYTHING, STUDY INSTANTLY: Get started in seconds. Upload handwritten notes, PDFs, lecture videos, or even paste a YouTube link. Thea's AI extracts the key information and builds your personalized study kit. SMART STUDY: Move beyond rote memorization. Our AI-powered adaptive learning generates questions that focus on your weak spots, getting more challenging as you master the material. MEMORIZE FASTER: Use interactive flashcards and engaging game modes built on a proven spaced repetition system. Perfect for on-the-go learning that makes information stick. TEST WITH CONFIDENCE: Generate practice tests from your study materials to simulate the real exam environment. Build confidence and refine your strategy before exam day. SUMMARIZE & CREATE GUIDES: Instantly distill dense information into concise summaries. Generate comprehensive, downloadable study guides with a single click to simplify your revision process. DESIGNED FOR STUDENTS EVERYWHERE: With support for over 80 languages, you can learn and study in the language you're most comfortable with for better understanding. ACCESSIBLE ANYTIME, ANYWHERE: Thea works seamlessly across your computer, tablet, and smartphone. Your study companion goes wherever you do. A POWERFUL TOOL FOR EDUCATORS: Create classes, assign AI-generated study modules from your own teaching materials, and track student progress with our powerful analytics. Get Started in Seconds! Download Thea today and start achieving better results with less stress! EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of service: https://www.theastudy.com/termsofservice Privacy policy: https://www.theastudy.com/privacy
Screenshots
Verdict
The clearest difference is price: Thea at Free against listerCompass's $5.99. Thea also leads on review sentiment (93% vs 50%) and rating (4.9 vs 1.0). listerCompass's advantage is in-app purchases (none vs 2). On ads 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
Thea is free to download; listerCompass costs $5.99 up front. Thea sells 2 in-app purchases, starting at $12.00 per month. listerCompass asks for nothing beyond the download.
Thea holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Thea has 2.6K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of listerCompass's written reviews are positive against 93% of Thea's.
listerCompass ships an update every 5 months, Thea monthly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | listerCompass | Thea |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 1.0 (1 ratings) | 4.9 (2.6K ratings) — better |
| Positive reviews | 50.0% of reviews | 92.7% of reviews — better |
| Number of ratings | 1 | 2.6K — better |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | Gordon Lister | Thea Study |
Customer experience
listerCompass
Thea
Bugs and requests
listerCompass
Not enough reviews yet to summarise bugs or requests.
Thea
Reported bugs
1 issue- Answers not mixed up in matching game
Requested features
2 requests- Spaced repetition setting
- More customization options
In-app purchases
listerCompass
No in-app purchases
Thea
- Monthly$12.001 Month
- Yearly$48.001 Year







