# 초록잔디 vs Programmer Calculator

The clearest difference is review sentiment: 초록잔디 at 100% against Programmer Calculator's 42%. 초록잔디 also leads on in-app purchases (none vs 3) and update cadence (weekly vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Programmer Calculator sells 3 one-off in-app purchases. 초록잔디 asks for nothing beyond the download.

초록잔디 ships an update weekly, Programmer Calculator fortnightly. The most recent releases landed on September 23, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 초록잔디 | Programmer Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (32 ratings)](https://appshunter.io/ios/app/programmer-calculator-dev/id1624892520/reviews)** |
| Number of ratings | — | **32** |
| Positive reviews | **100.0% of reviews** | 42.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 5 MB |
| Requires iOS | 14.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ain Kim](https://appshunter.io/developer/1670584331) | [永超 侯](https://appshunter.io/developer/906391544) |

## What reviewers say

### 초록잔디

[App page](https://appshunter.io/ios/app/id1602956399)

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

**In-app purchases:** none


### Programmer Calculator

[App page](https://appshunter.io/ios/app/programmer-calculator-dev/id1624892520)

This tool assists developers with number base conversions and CRC calculations for strings and hex bytes. Additional features are planned for future updates.

**Highlights:** Number base conversion, CRC calculation, String to hex conversion, Hex byte CRC calculation, Developer support tool

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coke | $0.99 | one-time |
| A cup of coffee | $2.99 | one-time |
| A big meal | $5.99 | one-time |


## Frequently asked questions

### Is 초록잔디 free?

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

### Is Programmer Calculator free?

Programmer Calculator is free to download, with in-app purchases available.

### Do 초록잔디 or Programmer Calculator have ads?

Neither 초록잔디 nor Programmer Calculator shows ads.

### Which is updated more often, 초록잔디 or Programmer Calculator?

초록잔디 ships an update weekly, and Programmer Calculator fortnightly. Most recently, 초록잔디 was updated on September 23, 2026 and Programmer Calculator on September 28, 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.*