# Dogl Calculus vs Trigonometry(Math Drills)

The clearest difference is in-app purchases: Trigonometry(Math Drills) at none against Dogl Calculus's 3. Trigonometry(Math Drills) also leads on update cadence (monthly vs every 2 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Dogl Calculus sells 3 one-off in-app purchases. Trigonometry(Math Drills) asks for nothing beyond the download.

Dogl Calculus ships an update every 2 months, Trigonometry(Math Drills) monthly. The most recent releases landed on September 19, 2026 and August 4, 2026 respectively.

## The numbers

| Metric | Dogl Calculus | Trigonometry(Math Drills) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (146 ratings)](https://appshunter.io/ios/app/dogl-calculus/id1554140181/reviews)** | — |
| Number of ratings | **146** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 28 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dogl](https://appshunter.io/developer/1554140183) | [郷 田村](https://appshunter.io/developer/1574588679) |

## What reviewers say

### Dogl Calculus

[App page](https://appshunter.io/ios/app/dogl-calculus/id1554140181)

Master calculus with this mobile app designed by university professors. It offers bite-sized problem-solving, personalized learning paths, and hints to guide you through challenging concepts. Start with free practice problems and unlock more weekly.

**Highlights:** Bite-sized problem-solving, Personalized learning paths, Weekly free problems, Teacher's Eye™ hints, Ad-free experience, Expert-designed content

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Plan - 1 month | $4.99 | one-time |
| Unlimited Plan - 4 months | $14.99 | one-time |
| Unlimited Plan - 1 year | $24.99 | one-time |


### Trigonometry(Math Drills)

[App page](https://appshunter.io/ios/app/trigonometrymath-drills/id1623896351)

Master trigonometry concepts offline with this educational app. It covers essential topics like the Pythagorean theorem, right triangles, special angles, and shape measurements. Challenge yourself to improve your rank and test your knowledge.

**Highlights:** Offline learning, Pythagorean theorem, Right triangle trigonometry, Coordinate trigonometry, Special angles, Shape measurements, Challenge Mode for ranking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dogl Calculus free?

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

### Is Trigonometry(Math Drills) free?

Trigonometry(Math Drills) is free to download, with no in-app purchases.

### Do Dogl Calculus or Trigonometry(Math Drills) have ads?

Neither Dogl Calculus nor Trigonometry(Math Drills) shows ads.

### Which is updated more often, Dogl Calculus or Trigonometry(Math Drills)?

Dogl Calculus ships an update every 2 months, and Trigonometry(Math Drills) monthly. Most recently, Dogl Calculus was updated on September 19, 2026 and Trigonometry(Math Drills) on August 4, 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.*