# Classroom Spinners vs Calcu

The clearest difference is price: Calcu at Free against Classroom Spinners's $0.99. Calcu also leads on update cadence (every 3 days vs every 21 months). Classroom Spinners's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Calcu is free to download; Classroom Spinners costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Classroom Spinners ships an update every 21 months, Calcu every 3 days. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Classroom Spinners | Calcu |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calcu-logarithm/id6698852208/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 days** |
| Monetization | — | Free |
| Size | 7 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad, Apple TV | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### Classroom Spinners

[App page](https://appshunter.io/ios/app/classroom-spinners/id1143588037)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calcu

[App page](https://appshunter.io/ios/app/calcu-logarithm/id6698852208)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Classroom Spinners free?

Classroom Spinners costs $0.99, with no in-app purchases.

### Is Calcu free?

Calcu is free to download, with no in-app purchases.

### Do Classroom Spinners or Calcu have ads?

Neither Classroom Spinners nor Calcu shows ads.

### Which is updated more often, Classroom Spinners or Calcu?

Classroom Spinners ships an update every 21 months, and Calcu every 3 days. Most recently, Classroom Spinners was updated on October 17, 2026 and Calcu on October 24, 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.*