# NRG Optimizer vs Smart Battery 24V

The clearest difference is update cadence: Smart Battery 24V at every 5 weeks against NRG Optimizer's every 13 months. NRG Optimizer's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

NRG Optimizer ships an update every 13 months, Smart Battery 24V every 5 weeks. The most recent releases landed on October 14, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NRG Optimizer | Smart Battery 24V |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/smart-battery-24v/id6449736747/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 154 MB | 68 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [T.G.L. Inc.](https://appshunter.io/developer/1629823848) | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) |

## What reviewers say

### NRG Optimizer

[App page](https://appshunter.io/ios/app/nrg-optimizer/id1629823846)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Battery 24V

[App page](https://appshunter.io/ios/app/smart-battery-24v/id6449736747)

Monitor the voltage of up to four 6V, 12V, or 24V batteries simultaneously. Test startup and charging systems, and accurately record vehicle start and stop times. View all data on your phone via Bluetooth for easy vehicle battery management.

**Highlights:** Monitor 6V, 12V, 24V batteries, Simultaneous monitoring of four batteries, Test startup and charging system voltage, Record vehicle start/stop times, Bluetooth data display, Vehicle battery power management

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NRG Optimizer free?

NRG Optimizer is free to download, with no in-app purchases.

### Is Smart Battery 24V free?

Smart Battery 24V is free to download, with no in-app purchases.

### Do NRG Optimizer or Smart Battery 24V have ads?

Neither NRG Optimizer nor Smart Battery 24V shows ads.

### Which is updated more often, NRG Optimizer or Smart Battery 24V?

NRG Optimizer ships an update every 13 months, and Smart Battery 24V every 5 weeks. Most recently, NRG Optimizer was updated on October 14, 2026 and Smart Battery 24V on September 27, 2026.

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