# Overkill Solar vs Whisper Lithium

The clearest difference is rating: Overkill Solar at 4.7 against Whisper Lithium's 3.0. Overkill Solar also leads on ratings volume (16 vs 4) and iOS requirement (13.4 vs 15.6). Whisper Lithium's advantage is update cadence (every 3 weeks vs every 4 months). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Overkill Solar holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 16 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Overkill Solar ships an update every 4 months, Whisper Lithium every 3 weeks. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Overkill Solar | Whisper Lithium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/whisper-lithium/id6461822734/reviews) |
| Number of ratings | **16** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 21 MB | 32 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) | [江西达伙网络科技有限公司](https://appshunter.io/developer/1234844673) |

## What reviewers say

### Overkill Solar

[App page](https://appshunter.io/ios/app/overkill-solar/id6444233824)

This app connects to a solar battery management system to provide detailed monitoring and control. Users can track cell voltage, capacity, current, and manage charging/discharging ports. It also offers advanced configuration options for calibration, balancing, and protection settings.

**Highlights:** Monitor cell voltage and capacity, Control charging and discharging ports, Calibrate voltage and current, Configure balancer and protection values, Log voltage, current, and power, Monitor BMS alarms and temperature

**Features:** macOS Compatibility

**In-app purchases:** none


### Whisper Lithium

[App page](https://appshunter.io/ios/app/whisper-lithium/id6461822734)

This app monitors and manages lithium battery systems in real-time. It displays critical battery parameters, alerts users to potential issues like over-temperature or voltage anomalies, and helps prolong battery life and enhance pack stability. It also supports viewing multiple battery statuses and offers online assistance.

**Highlights:** Real-time voltage, current, and power display, Single battery voltage and alarm status, Cell comparison and balance display, Temperature and short circuit warnings, Warning event logging, Support for multiple battery viewing, Online assistance

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Overkill Solar free?

Overkill Solar is free to download, with no in-app purchases.

### Is Whisper Lithium free?

Whisper Lithium is free to download, with no in-app purchases.

### Which has better reviews, Overkill Solar or Whisper Lithium?

Overkill Solar is rated higher. Overkill Solar averages 4.7 out of 5 from 16 ratings, while Whisper Lithium averages 3.0 from 4 ratings.

### Do Overkill Solar or Whisper Lithium have ads?

Neither Overkill Solar nor Whisper Lithium shows ads.

### Which is updated more often, Overkill Solar or Whisper Lithium?

Overkill Solar ships an update every 4 months, and Whisper Lithium every 3 weeks. Most recently, Overkill Solar was updated on October 14, 2026 and Whisper Lithium on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*