# Trigonometry! vs I Aced Calculus AP Prep

The clearest difference is review sentiment: I Aced Calculus AP Prep at 88% against Trigonometry!'s 14%. I Aced Calculus AP Prep also leads on rating (4.6 vs 2.0) and update cadence (every 2 weeks vs every 4 months). Trigonometry!'s advantage is monetization model (free vs free with in-app purchases) and iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Trigonometry! sells 1 one-off in-app purchase and I Aced Calculus AP Prep sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

I Aced Calculus AP Prep holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: I Aced Calculus AP Prep has 30 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 14% of Trigonometry!'s written reviews are positive against 88% of I Aced Calculus AP Prep's.

Trigonometry! ships an update every 4 months, I Aced Calculus AP Prep every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Trigonometry! | I Aced Calculus AP Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/trigonometry/id1236663817/reviews) | **[4.6 (30 ratings)](https://appshunter.io/ios/app/i-aced-calculus-ap-prep/id1666694535/reviews)** |
| Number of ratings | 4 | **30** |
| Positive reviews | 14.3% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 29 MB | 64 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AppCrab](https://appshunter.io/developer/1227198215) | [I Aced Calculus, LLC](https://appshunter.io/developer/1666694957) |

## What reviewers say

### Trigonometry!

[App page](https://appshunter.io/ios/app/trigonometry/id1236663817)

Master trigonometry with this comprehensive mobile helper. It offers a textbook, visual explanations, and video lessons covering all essential formulas and theorems. Prepare for your exams with detailed content and easy-to-understand explanations.

**Highlights:** Ordered set of basic formulas and theorems, 172 video lessons, Easy-to-read and understand textbook, Covers major trigonometry topics, Visual explanations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trigonometry Premium | $0.99 | one-time |


### I Aced Calculus AP Prep

[App page](https://appshunter.io/ios/app/i-aced-calculus-ap-prep/id1666694535)

Master single-variable calculus with this comprehensive study companion. It offers flashcards, practice questions, video explanations, and AI assistance to prepare for AP exams or college courses. Study modes and difficulty levels cater to all learners.

**Highlights:** 400+ Smart Flashcards, 1200+ Practice Questions, Video Explanations, AI Assistance, Spaced Repetition Study Mode, Calculator Tips

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $7.99 | per month |
| Premium - 3 Months | $19.99 | per 3 months |
| Premium - Annual | $35.99 | per year |


## Frequently asked questions

### Is Trigonometry! free?

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

### Is I Aced Calculus AP Prep free?

I Aced Calculus AP Prep is free to download, with in-app purchases available.

### Which has better reviews, Trigonometry! or I Aced Calculus AP Prep?

I Aced Calculus AP Prep is rated higher. Trigonometry! averages 2.0 out of 5 from 4 ratings, while I Aced Calculus AP Prep averages 4.6 from 30 ratings.

### Do Trigonometry! or I Aced Calculus AP Prep have ads?

Neither Trigonometry! nor I Aced Calculus AP Prep shows ads.

### Which is updated more often, Trigonometry! or I Aced Calculus AP Prep?

Trigonometry! ships an update every 4 months, and I Aced Calculus AP Prep every 2 weeks. Most recently, Trigonometry! was updated on November 2, 2026 and I Aced Calculus AP Prep on November 3, 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.*