Smart Slide Rule vs ポケット手帳
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.
ポケット手帳
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ポケットに入れられる手帳です。
Screenshots
Verdict
The clearest difference is price: ポケット手帳 at Free against Smart Slide Rule's $0.99. ポケット手帳 also leads on update cadence (weekly vs every 2 months). Smart Slide Rule's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On 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
ポケット手帳 is free to download; Smart Slide Rule costs $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, ポケット手帳 weekly. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.
| Parameter | Smart Slide Rule | ポケット手帳 |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 4 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Sohta Itoh | Kento Takise |
In-app purchases
Smart Slide Rule
No in-app purchases
ポケット手帳
No in-app purchases
