# KaNKaN vs Simple Calculator. +

The clearest difference is update cadence: Simple Calculator. + at every 3 months against KaNKaN's every 101 months. Simple Calculator. + also leads on price ($1.99 vs $2.99). KaNKaN's advantage is review sentiment (86% vs 73%) and iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

KaNKaN costs $2.99 and Simple Calculator. + $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KaNKaN ships an update every 101 months, Simple Calculator. + every 3 months. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | KaNKaN | Simple Calculator. + |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | — | **[4.7 (147 ratings)](https://appshunter.io/ios/app/simple-calculator-plus/id1324927779/reviews)** |
| Number of ratings | — | **147** |
| Positive reviews | **85.7% of reviews** | 72.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 101 months | **Every 3 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 29 MB | 1 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kaji Takatsugu](https://appshunter.io/developer/465688467) | [tasser gyati](https://appshunter.io/developer/1324926550) |

## What reviewers say

### KaNKaN

[App page](https://appshunter.io/ios/app/kankan/id1084225678)

This app simulates Japanese fire truck sirens and flashing lights. It allows users to record and play back custom sounds, featuring different siren patterns and bell sounds. Note that it does not function as a real siren amplifier and legal use of siren sounds should be confirmed.

**Highlights:** Simulated fire truck sirens, Flashing light patterns, Custom sound recording, Preset siren and bell sounds, Left/right turn sound effects, Adjustable siren volume

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Calculator. +

[App page](https://appshunter.io/ios/app/simple-calculator-plus/id1324927779)

This app offers a straightforward and dependable calculator for iPhone and iPad. It includes advanced features like tax calculation, cost/selling price/margin calculations, and memory operations. A free version is available to try before purchasing.

**Highlights:** 12-digit display, Tax calculation, Cost, selling price, and gross margin calculations, Memory operations, Grand total (GT), Percentage calculation

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

**In-app purchases:** none


## Frequently asked questions

### Is KaNKaN free?

KaNKaN costs $2.99, with no in-app purchases.

### Is Simple Calculator. + free?

Simple Calculator. + costs $1.99, with no in-app purchases.

### Do KaNKaN or Simple Calculator. + have ads?

Neither KaNKaN nor Simple Calculator. + shows ads.

### Which is updated more often, KaNKaN or Simple Calculator. +?

KaNKaN ships an update every 101 months, and Simple Calculator. + every 3 months. Most recently, KaNKaN was updated on October 17, 2026 and Simple Calculator. + on October 19, 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.*