EVJA vs Rock Identifier | Stone ID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EVJA
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The future of farming is here. Turn complex data into actionable decisions. The EVJA app is the core of our Agronomic Intelligence Platform: a patented system that integrates monitoring, agronomic analysis, crop protection, and sustainability. From microclimate management to predictive disease models, EVJA helps you optimize resources and enhance harvest quality. Key Features: • Total Control ◦ Intuitive Dashboard: View crop status in real-time and quickly access Air and Substrate data. ◦ Interactive Map: Create monitored plots and crop registries in minutes. Every insight is fully geolocated. • Real-Time Weather & Sensors ◦ Microclimatic Data: Monitor temperature, relative humidity, soil/substrate moisture, leaf wetness, and solar radiation directly from the field. ◦ Geolocated Forecasts: Plan field activities with high-accuracy weather forecasts integrated directly into the app. • Crop Protection & Agronomic Models ◦ Disease Risk Indices: Get early warnings for major pathogens (e.g., Downy Mildew, Powdery Mildew, Botrytis) based on scientific predictive models. ◦ Agronomic Calculations: Automatically track complex parameters like Evapotranspiration (ET), Growing Degree Days (GDD), Chilling Hours, and Dew Point. • Smart Planning ◦ Activity Calendar: Log events, treatments, and field observations. Share them only with your chosen collaborators. ◦ Custom Alerts: Set alarm thresholds for every parameter to receive instant notifications when critical levels are reached. ◦ Yield Prediction: Essential for production planning and meeting large-scale retail (GDO) demands. • Measurable Sustainability ◦ Sustainable Irrigation: Monitor environmental impact and manage irrigation based on precise data for a greener farm. ◦ Carbon Footprint Balance: IPCC-compliant calculations to measure and optimize CO2 emissions and sequestration. Cultivating innovation, harvesting sustainability. Download the app now and take your farm into the future.
Rock Identifier | Stone ID
Identify rocks, minerals, crystals, and fossils instantly with a photo. Get scientific data, market value estimates, and track your collection. Explore the earth's secrets with this geological lab in your pocket.
- Instant photo identification
- Real-time value estimator
- Comprehensive geological data
- Interactive crystal guide
- Personal collection tracker
- Similar specimen finder
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Turn your smartphone into a powerful geological lab with Stone ID. Instantly identify rocks, minerals, crystals, gemstones, and fossils from a single photo and uncover their hidden stories and values. Whether you are an active rockhound, a passionate crystal collector, a jewelry enthusiast, or a curious hiker, our advanced AI analyzes color, texture, and crystal structures to deliver accurate scientific data in seconds. Key Features: • Instant Photo Identification: Snap a picture to identify any stone, crystal, or mineral instantly. • Real-Time Value Estimator: Get market value estimates for precious gemstones and collector minerals. • Comprehensive Geological Data: Learn about mineral composition, hardness scale, origin, and rarity. • Interactive Crystal Guide: Explore physical properties, geological history, and chemical formulas. • Personal Collection Tracker: Save your discoveries and build your own digital treasure chest. • Similar Specimen Finder: Compare your finds with visually similar rocks and ores. Designed for collectors, prospectors, and geology students alike, Stone ID makes exploring the earth educational and exciting. Start identifying today! Download Stone ID now and uncover the secrets of the stones beneath your feet. Free vs Premium • Free: 1 analysis, limited pricing details. • Premium (Unlimited): • Weekly: $4.99 • Annual: $39.99 • Lifetime: $79.99 (Prices may vary by region. Subscriptions auto-renew; manage or cancel anytime in your iOS Settings.) Links • Terms of Use: https://vexlab.app/p/stoneid/terms • Privacy Policy: https://vexlab.app/p/stoneid/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: EVJA at none against Rock Identifier | Stone ID's 3. EVJA also leads on iOS requirement (13.0 vs 15.0). On price, 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
Both are free to download. Rock Identifier | Stone ID sells 3 in-app purchases, starting at $4.99 per 7 days. EVJA asks for nothing beyond the download.
| Parameter | EVJA | Rock Identifier | Stone ID |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 57 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | EVJA s.r.l. | DIDEM URAS |
In-app purchases
EVJA
No in-app purchases
Rock Identifier | Stone ID
- Weekly Plan3 Days trial$4.997 Days
- Yearly Plan3 Days trial$39.991 Year
- Lifetime Plan$79.99






