Cluster2A vs LetsGeo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cluster2A
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Machine learning has become a powerful tool, revolutionizing how industries operate. Unsupervised learning is a machine learning method that analyzes and discovers hidden patterns, structures, or relationships in unclassified or unlabeled data. It is widely used to improve customer experience, provide personalized recommendations, optimize operations, and drive innovation. K-means and DBSCAN are two commonly used unsupervised learning algorithms. Common application scenarios: Customer and market segmentation: Grouping customers based on their behavior, demographic characteristics, or purchase history for targeted marketing and personalized recommendations. Retail analytics: Identifying "hotspot areas" in a store through cluster analysis of customer locations. Cluster2A combines two machine learning algorithms, K-means and DBSCAN, to help users with small datasets take their first steps into the world of machine learning more easily and enjoyably.
LetsGeo
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Let’sGeo - professional geological field logging app Let’sGeo is a professional offline field tool for geological and geotechnical logging, drilling operations and mineral exploration. Designed for real field and core shed work, it combines geological descriptions, structural measurements, drilling data and geological mapping in a single structured workflow - fully offline. Key features Geological & structural logging • Field points with lithology, mineralization, alteration and weathering • Standardized geological codes with free-text descriptions • Built-in compass and clinometer for dip and dip direction • Structural elements: bedding, joints, faults, shear zones and veins • Vein parameters: thickness, mineralogy and density • Stereonet (Schmidt & Wulff) visualization Geotechnical logging in drillholes • Two-level workflow: - Single structural records linked to depth - Interval-based geotechnical domains • Core recovery, TCR, SCR and RQD • Rock mass parameters and fracture angle classes • Core boxes with depth-linked photo documentation Drilling & sampling • Drillhole runs and recovery tracking • Interval sampling with full metadata • Geological samples linked directly to logging intervals Mapping & GIS • GPS points and drillholes • Coordinate input and conversion (WGS-84, UTM, Gauss-Krüger) • GPS track recording • GPS accuracy recording and storage • Custom point and drillhole marker styles and colors • Point and drillhole visibility controls • Compass-oriented map navigation with live azimuth display • Distance and true bearing (TN) to selected points and drillholes • KMZ layers with map drawing and editing tools • KMZ layer ordering and management • Offline satellite imagery download directly inside the app • Satellite spectral maps for mineral exploration • SWIR lithology, clay alteration and iron oxide composites • Download spectral scenes for offline geological interpretation Reference Collection • Project-based geological reference collections • Rock photos with descriptions and geological notes • Import and export reference collections between projects and devices • Reference image similarity search • Compare field photos with reference collection samples • Find visually similar rock specimens using image analysis of color, grain characteristics, texture patterns and vein features Media & data • Photos, video and audio linked to observations • Field sketch sheets for hand-drawn geological sketches • Photo annotation and markup tools • Offline-first: all data stored locally • Full project export/import • Project Database Archive export • Merge project archives between devices without overwriting existing data wherever possible • Cross-platform data exchange between Android and iOS devices Privacy Let’sGeo stores all data locally on your device. Nothing is uploaded or shared unless you explicitly choose to export it. Privacy Policy: https://letsgeo.world/privacy.php Terms of Use (EULA): https://letsgeo.world/terms.php
Screenshots
Verdict
The clearest difference is update cadence: LetsGeo at weekly against Cluster2A's every 3 months. LetsGeo also leads on iOS requirement (18.6 vs 26.2). On price, ads, in-app purchases 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
Both are free to download. Cluster2A sells 2 one-off in-app purchases and LetsGeo sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Cluster2A ships an update every 3 months, LetsGeo weekly. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.
| Parameter | Cluster2A | LetsGeo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 26.2 | 18.6 — better |
| Further details — not scored | ||
| Size | 9 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | Chu-Yi Chang | Letsmine SIA |
In-app purchases
Cluster2A
- K-means Model$1.99
- DBSCAN Model$1.99
LetsGeo
- Full Access Monthly$4.991 Month









