# GJ vs Dr. Copper

The clearest difference is update cadence: Dr. Copper at every 4 days against GJ's every 4 months. GJ's advantage is iOS requirement (10.0 vs 14.0). 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.

GJ ships an update every 4 months, Dr. Copper every 4 days. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | GJ | Dr. Copper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Size | 183 MB | 7 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grasphere Japan Co., Ltd.](https://appshunter.io/developer/1545362989) | [JX NIPPON MINING & METALS CORPORATION](https://appshunter.io/developer/1636464461) |

## What reviewers say

### GJ

[App page](https://appshunter.io/ios/app/gj-cloud/id1545362987)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dr. Copper

[App page](https://appshunter.io/ios/app/dr-copper/id1636464459)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GJ free?

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

### Is Dr. Copper free?

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

### Do GJ or Dr. Copper have ads?

Neither GJ nor Dr. Copper shows ads.

### Which is updated more often, GJ or Dr. Copper?

GJ ships an update every 4 months, and Dr. Copper every 4 days. Most recently, GJ was updated on October 8, 2026 and Dr. Copper on October 2, 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.*