# Trigonometry Practice vs Systems Thinking Daily

The clearest difference is iOS requirement: Trigonometry Practice at 13.0 against Systems Thinking Daily's 15.1. On price, ads, in-app purchases and device support there is nothing between them.

Trigonometry Practice costs $0.49 and Systems Thinking Daily $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Trigonometry Practice | Systems Thinking Daily |
| --- | --- | --- |
| Price | **$0.49** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | — |
| Size | 20 MB | 22 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Manish Kumar](https://appshunter.io/developer/1854995154) | [JollofCreative LLC](https://appshunter.io/developer/1888948457) |

## What reviewers say

### Trigonometry Practice

[App page](https://appshunter.io/ios/app/trigonometry-practice/id6755685152)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Systems Thinking Daily

[App page](https://appshunter.io/ios/app/systems-thinking-daily/id6761329640)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Practice free?

Trigonometry Practice costs $0.49, with no in-app purchases.

### Is Systems Thinking Daily free?

Systems Thinking Daily costs $0.99, with no in-app purchases.

### Do Trigonometry Practice or Systems Thinking Daily have ads?

Neither Trigonometry Practice nor Systems Thinking Daily shows ads.

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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.*