# Simple Calculator *FLAT calc vs hechiriko

The clearest difference is update cadence: Simple Calculator *FLAT calc at every 2 months against hechiriko's every 21 months. Simple Calculator *FLAT calc also leads on iOS requirement (11.0 vs 13.0). 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.

Simple Calculator *FLAT calc ships an update every 2 months, hechiriko every 21 months. The most recent releases landed on November 2, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Simple Calculator *FLAT calc | hechiriko |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 21 months |
| Size | 10 MB | 5 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Bakerstreet Co., Ltd.](https://appshunter.io/developer/1090599145) | [Mayuko Shiino](https://appshunter.io/developer/1572414401) |

## What reviewers say

### Simple Calculator *FLAT calc

[App page](https://appshunter.io/ios/app/simple-calculator-flat-calc/id1392010421)

**Features:** macOS Compatibility

**In-app purchases:** none


### hechiriko

[App page](https://appshunter.io/ios/app/hechiriko/id1572414399)

**In-app purchases:** none


## Frequently asked questions

### Is Simple Calculator *FLAT calc free?

Simple Calculator *FLAT calc is free to download, with no in-app purchases.

### Is hechiriko free?

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

### Do Simple Calculator *FLAT calc or hechiriko have ads?

Neither Simple Calculator *FLAT calc nor hechiriko shows ads.

### Which is updated more often, Simple Calculator *FLAT calc or hechiriko?

Simple Calculator *FLAT calc ships an update every 2 months, and hechiriko every 21 months. Most recently, Simple Calculator *FLAT calc was updated on November 2, 2026 and hechiriko on September 14, 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.*