Locus Mobile vs Stem PowerTrack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Locus Mobile
This app facilitates efficient field data collection and upload for environmental information management systems. It offers an interactive map interface, location intelligence, and data validation to ensure accuracy and improve workflow, even in remote areas.
- Accurate field data collection
- Offline data entry and synchronization
- Interactive map interface with location intelligence
- Configurable data entry rules and validation
- Ad hoc sampling and location management
- Status tracking with labeling and color coding
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System Requirements: - iOS 13.0 or higher Description: Locus Mobile for iOS works in conjunction with Locus’ environmental information management systems. The mobile application is used for simple and accurate data collection and upload from the field, and in the process improves workflow, enables productivity gains, ensures accuracy, and leverages location intelligence. Interaction with Locus Mobile does not require a real-time data connection, and content from the field is uploaded when it is convenient. Field users can work in remote locations with the assurance that all entries are saved and then synchronized back to a secure storage location once they are able to obtain Wi-Fi or cellular data service. Field data collection requirements and sophisticated data entry rules are configured from within Locus’ system and then assigned to field users and enforced through the mobile device. Field data entries are validated upon entry, and the user is provided with guidance on expected field measurement values. Once data are collected they are uploaded to the parent system for review, analysis, and reporting purposes, where they can also be easily audited for compliance support. Mobile users are presented with an interactive map interface that shows where sampling locations are and provides status information regarding the required data collection program. The interface supports ad hoc sampling activities that allow users to add sample locations and complete new data entry events. Locus Mobile application users can take advantage of the inherent location intelligence that has been built in: - The app is built around a map interface - Where do I need to go - Where have I been - Where am I now - Status of data collection/sampling is immediately evident using labeling and color coding - Add new locations on the fly – in the field (ad hoc) - Locations can be dragged/moved to refine placement - Delete and start again - Use satellite background images for improved context Locus Mobile can be used for processing field data collection operations for multiple users working within the same program. The system can be configured for a wide range of measurements related to well monitoring, air sampling and soil sampling. Locus Technologies clients are required to opt in to using the Locus Mobile application in conjunction with the client’s Locus environmental information management systems. Locus mobile users are required to obtain a user account from Locus Technologies in order to log into the Locus Mobile application. The app does not require users to submit payment for content or services within the app. Access and user accounts to the app are granted by Locus Technologies. Contact Locus Technologies via email at info@locustec.com for more information. The app is primarily meant for distribution in the United States. About Locus Technologies: Locus provided businesses with the power to be green on-demand since its founding in 1997. Locus' cloud software enables companies to organize and validate all key environmental information in a single system, which includes analytical data for water, air, soil, greenhouse gases, sustainability, compliance, and environmental content. Locus software is delivered through Cloud Computing (SaaS), so there is no hardware to procure, no large up-front license fee, and no complex set-ups. For more information email info@locustec.com.
Stem PowerTrack
Monitor and analyze solar PV projects and energy systems remotely. Site owners can view data and forecasts, while technicians can diagnose and fix issues on-site using their mobile devices.
- Site overview with easy-to-read data
- In-depth site data analysis via charts
- Current weather and forecast for sites
- Detailed hardware technical information
- Fast hardware alerts and error detection
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Newly redesigned and relaunched: PowerTrack is back with a fully updated experience for site owners and field technicians. PowerTrack by Stem puts your solar, storage, and hybrid site data in your pocket. Whether you're a site owner tracking performance or a technician monitoring assets in the field, PowerTrack gives you real-time visibility and control from your phone. Features Site Overview: See the key metrics that matter at a glance Charts & Historical Data: Analyze trends and review performance over time Weather: View current conditions and forecasts for your site Hardware Monitoring: Check device configurations and live incoming data Active Alerts: Stay on top of hardware alerts before they become problems Formerly the AlsoEnergy app. AlsoEnergy is now Stem, and this is the same app you know, enhanced, and under the PowerTrack name. About Stem: Stem is a leading global provider of AI-driven clean energy software and services, helping customers optimize solar, hybrid, and energy storage assets. Learn more: www.stem.com Privacy Notice: https://www.stem.com/privacy-notice/
Screenshots
Verdict
The clearest difference is review sentiment: Locus Mobile at 75% against Stem PowerTrack's 20%. Locus Mobile also leads on rating (4.8 vs 3.0). Stem PowerTrack's advantage is ratings volume (40 vs 6). On price, update cadence, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Locus Mobile holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Stem PowerTrack has 40 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 75% of Locus Mobile's written reviews are positive against 20% of Stem PowerTrack's.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 4, 2026 and September 25, 2026 respectively.
| Parameter | Locus Mobile | Stem PowerTrack |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (6 ratings) — better | 3.0 (40 ratings) |
| Positive reviews | 75.0% of reviews — better | 20.0% of reviews |
| Number of ratings | 6 | 40 — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Locus Technologies | Also Energy, Inc. |
Customer experience
Locus Mobile
Stem PowerTrack
In-app purchases
Locus Mobile
No in-app purchases
Stem PowerTrack
No in-app purchases
Questions
Is Locus Mobile free?
Is Stem PowerTrack free?
Which has better reviews, Locus Mobile or Stem PowerTrack?
Do Locus Mobile or Stem PowerTrack have ads?
Which is updated more often, Locus Mobile or Stem PowerTrack?
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