# 2 Field % Calc vs ロボジョイ

The clearest difference is in-app purchases: 2 Field % Calc at none against ロボジョイ's 3. ロボジョイ's advantage is update cadence (every 5 days vs every 30 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ロボジョイ sells 3 one-off in-app purchases. 2 Field % Calc asks for nothing beyond the download.

2 Field % Calc ships an update every 30 months, ロボジョイ every 5 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 2 Field % Calc | ロボジョイ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/2-field-calc/id454060465/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 1 MB | 113 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Toshihiro Nakane](https://appshunter.io/developer/6799290769) | [Kyouhei Sakai](https://appshunter.io/developer/1842648488) |

## What reviewers say

### 2 Field % Calc

[App page](https://appshunter.io/ios/app/2-field-calc/id454060465)

Calculate percentages between two numbers for various uses, including resizing images and determining magnification. Ideal for DTP and web designers needing quick calculations.

**Highlights:** Calculate percent between two numbers, Image resizing by percentage, Magnification calculation, Useful for DTP and web designers

**Features:** macOS Compatibility

**In-app purchases:** none


### ロボジョイ

[App page](https://appshunter.io/ios/app/id6797167409)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| クレジット(回数券) | $2.99 | one-time |
| クレジット５枚セット | $14.99 | one-time |
| クレジット10枚セット | $29.99 | one-time |


## Frequently asked questions

### Is 2 Field % Calc free?

2 Field % Calc is free to download, with no in-app purchases.

### Is ロボジョイ free?

ロボジョイ is free to download, with in-app purchases available.

### Do 2 Field % Calc or ロボジョイ have ads?

Neither 2 Field % Calc nor ロボジョイ shows ads.

### Which is updated more often, 2 Field % Calc or ロボジョイ?

2 Field % Calc ships an update every 30 months, and ロボジョイ every 5 days. Most recently, 2 Field % Calc was updated on October 27, 2026 and ロボジョイ on October 24, 2026.

---

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