# Trigonometry Identities Proofs vs Implicit Differentiation Cal

The clearest difference is price: Implicit Differentiation Cal at Free against Trigonometry Identities Proofs's $0.99. Implicit Differentiation Cal also leads on update cadence (every 9 months vs every 32 months). Trigonometry Identities Proofs's advantage is chart position (#191 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Implicit Differentiation Cal is free to download; Trigonometry Identities Proofs costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trigonometry Identities Proofs ships an update every 32 months, Implicit Differentiation Cal every 9 months. The most recent releases landed on October 8, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Trigonometry Identities Proofs | Implicit Differentiation Cal |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-identities-proofs/id1547838514/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 9 months** |
| Monetization | Paid | — |
| Best chart rank | **#191** | — |
| Size | 18 MB | 24 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [H3Apps LLC](https://appshunter.io/developer/598620927) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## What reviewers say

### Trigonometry Identities Proofs

[App page](https://appshunter.io/ios/app/trigonometry-identities-proofs/id1547838514)

**Currently charting:** #191 Top Paid · Education (US App Store)

Learn and practice trigonometric identity proofs with step-by-step solutions. Compare your work to the app's detailed explanations, revealing each step individually.

**Highlights:** 42 trigonometric identity proofs, Step-by-step solution reveal, Compare your work to app solutions, Practice trigonometry, Educational math tool

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

**In-app purchases:** none


### Implicit Differentiation Cal

[App page](https://appshunter.io/ios/app/implicit-differentiation-cal/id1607963477)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Identities Proofs free?

Trigonometry Identities Proofs costs $0.99, with no in-app purchases.

### Is Implicit Differentiation Cal free?

Implicit Differentiation Cal is free to download, with no in-app purchases.

### Do Trigonometry Identities Proofs or Implicit Differentiation Cal have ads?

Neither Trigonometry Identities Proofs nor Implicit Differentiation Cal shows ads.

### Which is updated more often, Trigonometry Identities Proofs or Implicit Differentiation Cal?

Trigonometry Identities Proofs ships an update every 32 months, and Implicit Differentiation Cal every 9 months. Most recently, Trigonometry Identities Proofs was updated on October 8, 2026 and Implicit Differentiation Cal on September 18, 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.*