# Smart Slide Rule vs NIPPON

The clearest difference is update cadence: Smart Slide Rule at every 2 months against NIPPON's every 6 months. Smart Slide Rule also leads on iOS requirement (11.0 vs 15.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Smart Slide Rule costs $0.99 and NIPPON $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Smart Slide Rule ships an update every 2 months, NIPPON every 6 months. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Smart Slide Rule | NIPPON |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-slide-rule/id975047971/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Paid | Paid |
| Size | 4 MB | 41 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sohta Itoh](https://appshunter.io/developer/965803614) | [arakawa yuichiro](https://appshunter.io/developer/421879127) |

## What reviewers say

### Smart Slide Rule

[App page](https://appshunter.io/ios/app/smart-slide-rule/id975047971)

This app simulates a mechanical analog calculating tool, offering various logarithmic scales for multiplication, division, and trigonometric functions. It includes instructions on how to use the slide rule, making it a learning tool for this historical device.

**Highlights:** Simulates a slide rule, Includes A, B, C, CI, D, S, L, T, and K scales, Moveable slide strip and cursor, Instructions on slide rule usage, Calculates multiplication, division, and functions

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

**In-app purchases:** none


### NIPPON

[App page](https://appshunter.io/ios/app/nippon/id1610114016)

This app allows users to virtually raise national flags and play the national anthem anytime, anywhere. It also provides clear information on public holidays, making it easy to celebrate them. Ideal for those who cannot display a physical flag at home.

**Highlights:** Virtual flag raising, National anthem playback, Public holiday information, Home screen widget for holidays, Detailed holiday information

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Smart Slide Rule free?

Smart Slide Rule costs $0.99, with no in-app purchases.

### Is NIPPON free?

NIPPON costs $0.99, with no in-app purchases.

### Do Smart Slide Rule or NIPPON have ads?

Neither Smart Slide Rule nor NIPPON shows ads.

### Which is updated more often, Smart Slide Rule or NIPPON?

Smart Slide Rule ships an update every 2 months, and NIPPON every 6 months. Most recently, Smart Slide Rule was updated on October 19, 2026 and NIPPON on October 9, 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.*