# 4C Calculator vs Grid Getter

The clearest difference is in-app purchases: 4C Calculator at none against Grid Getter's 4. 4C Calculator also leads on iOS requirement (15.1 vs 17.6). Grid Getter's advantage is update cadence (every 2 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Grid Getter sells 4 in-app purchases, starting at $4.99 per month. 4C Calculator asks for nothing beyond the download.

4C Calculator ships an update monthly, Grid Getter every 2 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 4C Calculator | Grid Getter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 40 MB | 18 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Crane Central](https://appshunter.io/developer/1635073910) | [Marshland Software LLC](https://appshunter.io/developer/1828358804) |

## What reviewers say

### 4C Calculator

[App page](https://appshunter.io/ios/app/4c-calculator/id1635075590)

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

**In-app purchases:** none


### Grid Getter

[App page](https://appshunter.io/ios/app/grid-getter-powerwall-control/id6754716994)

Optimize your Tesla Powerwall for significant savings on electricity bills. This app automates battery dispatch to beat demand charges and maximize solar self-use. Gain detailed insights with a live dashboard and customizable rules.

**Highlights:** Beat demand charges with DemandGuard, Maximize solar self-use, Optimize TOU charging and discharging, Customizable automation rules, Live energy dashboard, Works with Powerwall 2, +, and 3

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |
| DemandGuard + Premium | $10.99 | per month |
| Premium | $54.99 | per year |
| DemandGuard + Premium | $112.99 | per year |


## Frequently asked questions

### Is 4C Calculator free?

4C Calculator is free to download, with no in-app purchases.

### Is Grid Getter free?

Grid Getter is free to download, with in-app purchases available.

### Do 4C Calculator or Grid Getter have ads?

Neither 4C Calculator nor Grid Getter shows ads.

### Which is updated more often, 4C Calculator or Grid Getter?

4C Calculator ships an update monthly, and Grid Getter every 2 days. Most recently, 4C Calculator was updated on November 3, 2026 and Grid Getter on November 5, 2026.

---

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