# Grace Solar vs Battery Internal Resistance

Grace Solar and Battery Internal Resistance are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Grace Solar | Battery Internal Resistance |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 71 MB | 28 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [Viet Hoang](https://appshunter.io/developer/1444382961) |

## What reviewers say

### Grace Solar

[App page](https://appshunter.io/ios/app/grace-solar/id1489691070)

**In-app purchases:** none


### Battery Internal Resistance

[App page](https://appshunter.io/ios/app/battery-internal-resistance/id6478009129)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grace Solar free?

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

### Is Battery Internal Resistance free?

Battery Internal Resistance is free to download, with no in-app purchases.

### Do Grace Solar or Battery Internal Resistance have ads?

Neither Grace Solar nor Battery Internal Resistance shows ads.

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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.*