SlipStick vs Calcu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SlipStick
This app is a fully functional digital reproduction of a classic engineering slide rule. It allows users to perform complex calculations like multiplication, division, logarithms, and trigonometry, just like the original manual tool.
- Virtual slide rule reproduction
- Multiplication and division
- Logarithm calculations
- Trigonometry calculations
- Classic engineering tool
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A reproduction of a classic engineering tool - the slide rule. This fully functional manual calculating device was the engineer and math student's means of quickly solving multiplication, division, logarithm and trigonometry calculations until the invention and wide spread use of electronic calculators.
Calcu
This app provides advanced logarithmic calculations and explanations, covering equation solving, Taylor series, digit-by-digit computation, and integral definitions. It also simplifies expressions, solves complex logarithmic equations, and includes a virtual slide rule.
- Solves logarithmic equations for y, x, and a
- Explains Taylor series for log_e(x)
- Illustrates digit-by-digit log_10(x) computation
- Explains log_e definition via integrals
- Simplifies logarithmic expressions
- Calculates and graphs complex logarithms
- Includes virtual slide rule
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Calcu-Logarithm performs calculations and helps user understand logarithms on advanced level: 1. Solves equation "y = log_a(x)” for “y”, “x”, and “a”, with relevant graphs. 2. Explains and illustrates how to compute log_e (x) from Taylor series. 3. Explains and illustrates how to compute log_10 (x) digit by digit (based on M.Goldberg algorithm). 4. Explains and provides proof of log_e definition as the integral of x inverse. 5. Simplifies logarithmic expressions and solves logarithmic equations with polynomials of up to 20th degree. 6. Includes virtual slide rule for multiplication and division. 7. Calculates, explains, and graphs logarithms of complex numbers. Developers welcome any feedback, please write to us at graphmath@aol.com. Please check out our other Math apps.
Screenshots
Verdict
The clearest difference is price: Calcu at Free against SlipStick's $0.99. Calcu also leads on rating (5.0 vs 4.6) and update cadence (every 3 days vs weekly). SlipStick's advantage is chart position (#179 vs unranked) and ratings volume (9 vs 1). On ads, in-app purchases and device support 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
Calcu is free to download; SlipStick costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calcu holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SlipStick has 9 ratings behind it against 1, so its average is the more settled of the two.
SlipStick ships an update weekly, Calcu every 3 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | SlipStick | Calcu |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 9 — better | 1 |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #179 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Steve Glenner | Yuri Morozov |
Customer experience
SlipStick
Calcu
In-app purchases
SlipStick
No in-app purchases
Calcu
No in-app purchases
