FieldTechELM vs Lunar Installer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FieldTechELM
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This app is used to give ELM Microgrid - Battery Energy Storage System owners, operators, and employees access to Testing, Commissioning, Preventative Maintenance, and Warranty tools and reporting features. All users will be either ELM employees or customers who have purchased ELM systems.
Lunar Installer
This app simplifies the setup of a specific system with guided processes, firmware updates, and automated tests. It offers in-app troubleshooting and live chat support to resolve issues efficiently. Leave job sites with confidence and reduce the need for return visits.
- Guided setup process
- Firmware updates
- Automated operational tests
- In-app troubleshooting
- Live chat support
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Lunar Installer’s guided process makes it brilliantly simple to set up a Lunar System. You can rapidly update systems with built-in firmware and run automated tests to verify operation. And if you run into issues, troubleshooting and live chat support are available right in the app. Lunar Installer lets you leave the jobsite with confidence — and avoid additional truck rolls.
Screenshots
Verdict
The clearest difference is update cadence: Lunar Installer at every 8 days against FieldTechELM's every 5 weeks. 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. Neither carries in-app purchases, so what you see is what you pay.
FieldTechELM ships an update every 5 weeks, Lunar Installer every 8 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.
| Parameter | FieldTechELM | Lunar Installer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.2 (5 ratings) — better |
| Number of ratings | — | 5 — better |
| Update frequency | Every 5 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 39 MB | 220 MB |
| Age rating | 4+ | 4+ |
| Developer | ELM Fieldsight LLC | Lunar Energy Limited |
In-app purchases
FieldTechELM
No in-app purchases
Lunar Installer
No in-app purchases
Questions
Is FieldTechELM free?
Is Lunar Installer free?
Do FieldTechELM or Lunar Installer have ads?
Which is updated more often, FieldTechELM or Lunar Installer?
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