Siren vs Florida Lithium
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Siren
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Activate Siren in emergency situations if you become lost or injured to draw attention to your location. Siren emits a unique 86dB sound pattern which will repeat for several hours while you are seeking help.
Florida Lithium
Monitor your lithium batteries in real-time with detailed diagnostics and status updates. Receive customizable push notifications for state of charge, voltage, current, temperature, and individual cell voltages.
- Real-time battery diagnostics
- State of charge monitoring
- Voltage and current tracking
- Temperature alerts
- Individual cell voltage display
- Push notifications
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The Florida Lithium battery monitor app provides real-time battery diagnostics, information, and updates about the status of your lithium batteries (which can be configured in a series, or viewed as individual batteries). The app interface allows you to enable push notifications and alerts relative to your battery’s state of charge, voltage level, current, temperature, and individual cell voltages.
Screenshots
Verdict
The clearest difference is update cadence: Florida Lithium at every 6 weeks against Siren's every 9 months. Florida Lithium also leads on iOS requirement (11.0 vs 16.0). 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.
Siren ships an update every 9 months, Florida Lithium every 6 weeks. The most recent releases landed on September 20, 2026 and October 5, 2026 respectively.
| Parameter | Siren | Florida Lithium |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 9 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 5 MB |
| Age rating | 4+ | 17+ |
| Developer | Apple | Shenzhenshi Handexing Technology Co. , Ltd. |
In-app purchases
Siren
No in-app purchases
Florida Lithium
No in-app purchases
