Smart Slide Rule vs NIPPON
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smart Slide Rule
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.
- 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
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* An app simulating a slide rule! * Smart Slide Rule reproduces a slide rule (slipstick) with A, B, C, CI, D, S, L, T, and K scales. A slide rule is a mechanical analog calculating tool that uses the principle of logarithms. The slide rule appears as an important prop in the movies "Apollo 13" and "The Wind Rises". This application reproduces a slide rule on the screen of your device. The front side of the slide strip corresponds to the B, C, and CI scales, and the back side corresponds to the S, L, and T scales. You can move the slide strip and the cursor. * With instructions on how to use the slide rule! * The slide rule uses a logarithmic scale to calculate multiplication, division, exponentiation, square root, and trigonometric and logarithmic functions. This application features an explanation of how to use the slide rule, so you can learn how to calculate. Since the calculation is performed in pixels of the device screen, the accuracy of the calculation cannot be guaranteed.
NIPPON
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.
- Virtual flag raising
- National anthem playback
- Public holiday information
- Home screen widget for holidays
- Detailed holiday information
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NIPPONは、いつでもどこも国旗の掲揚ができるアプリです。 祝日の情報も分かりやすく確認できるため、祝日には国旗の掲揚を行いましょう。 家に国旗を掲げることが出来ない方などに最適です。 スマホを立てかけ、国旗の旗めく姿を見るのも良いかもしれません。 ------------------------- ■ 使い方 ------------------------- アプリを起動して「国旗掲揚」ボタンを押すと、日章旗と君が代が再生されます。 祝日の当日にはアプリ内およびホーム画面のウジェットに祝日情報が表示されます。ウィジェットを使えばアプリを起動せずに祝日を確認できるため忘れてしまうことはありません。 1年間の祝日情報やそれぞれの詳細情報を確認して、より深く国民の祝日を祝いましょう。 ※ ウィジェット機能はiOS14以上から利用できる機能です。
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Smart Slide Rule | NIPPON |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Sohta Itoh | arakawa yuichiro |
Customer experience
Smart Slide Rule
NIPPON
In-app purchases
Smart Slide Rule
No in-app purchases
NIPPON
No in-app purchases
Questions
Is Smart Slide Rule free?
Is NIPPON free?
Do Smart Slide Rule or NIPPON have ads?
Which is updated more often, Smart Slide Rule or NIPPON?
Other comparisons
