# NorthStar Battery App vs RedoCalc

The clearest difference is ads: NorthStar Battery App at none against RedoCalc's shown. NorthStar Battery App also leads on device support (3 vs 1) and iOS requirement (8.0 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs every 3 months). On price 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.

NorthStar Battery App ships an update every 3 months, RedoCalc every 3 days. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | NorthStar Battery App | RedoCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/northstar-battery-app/id571261700/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 33 MB | 3 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ENERSYS SARL](https://appshunter.io/developer/1110848781) | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) |

## What reviewers say

### NorthStar Battery App

[App page](https://appshunter.io/ios/app/northstar-battery-app/id571261700)

Discover premium batteries and site solutions with this app. It helps you find the ideal product, compare performance, locate resellers, and access datasheets and videos. A built-in browser also lets you explore the company website.

**Highlights:** Product selection tools, Battery performance comparison, Reseller locator, Vehicle battery sizing, Datasheet downloads, Product videos, Built-in web browser

**Features:** macOS Compatibility

**In-app purchases:** none


### RedoCalc

[App page](https://appshunter.io/ios/app/redocalc/id6743318834)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NorthStar Battery App free?

NorthStar Battery App is free to download, with no in-app purchases.

### Is RedoCalc free?

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

### Do NorthStar Battery App or RedoCalc have ads?

RedoCalc shows ads; NorthStar Battery App does not.

### Which is updated more often, NorthStar Battery App or RedoCalc?

NorthStar Battery App ships an update every 3 months, and RedoCalc every 3 days. Most recently, NorthStar Battery App was updated on November 1, 2026 and RedoCalc on October 25, 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.*