# Antiderivative calculator vs Three

The clearest difference is in-app purchases: Antiderivative calculator at none against Three's 1. Antiderivative calculator also leads on iOS requirement (10.0 vs 16.0). Three's advantage is update cadence (every 5 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Three sells 1 one-off in-app purchase. Antiderivative calculator asks for nothing beyond the download.

Antiderivative calculator ships an update fortnightly, Three every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Antiderivative calculator | Three |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/three-body-simulation/id6817179834/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 30 MB | 10 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Sattar](https://appshunter.io/developer/1458483953) | [志强 曾](https://appshunter.io/developer/1800987336) |

## What reviewers say

### Antiderivative calculator

[App page](https://appshunter.io/ios/app/antiderivative-calculator/id1596021577)

This app calculates definite and indefinite integrals of mathematical functions, including trigonometric and logarithmic types. It provides step-by-step solutions, visual representations, and Riemann sums for a comprehensive understanding of integration. Users can easily input functions and specify integration variables and bounds.

**Highlights:** Definite and indefinite integration, Step-by-step integration solutions, Visual representation of integrals, Riemann's sum calculation, Custom math keyboard, Support for trigonometric and logarithmic functions

**Features:** macOS Compatibility

**In-app purchases:** none


### Three

[App page](https://appshunter.io/ios/app/three-body-simulation/id6817179834)

Explore the fascinating beauty of gravity and celestial motion. Interact with three bodies, discover countless orbital paths, and experiment with your own gravity scenarios. Turn curiosity into understanding with this educational simulation.

**Highlights:** Explore 16 classic periodic solutions, Discover 10,059 3D periodic orbits, Experiment with custom gravity scenarios, Learn about the three-body problem, Offline exploration of orbits, Interactive celestial motion simulation

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime Unlock | $1.99 | one-time |


## Frequently asked questions

### Is Antiderivative calculator free?

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

### Is Three free?

Three is free to download, with in-app purchases available.

### Do Antiderivative calculator or Three have ads?

Neither Antiderivative calculator nor Three shows ads.

### Which is updated more often, Antiderivative calculator or Three?

Antiderivative calculator ships an update fortnightly, and Three every 5 days. Most recently, Antiderivative calculator was updated on November 3, 2026 and Three on October 31, 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.*