# Trigonometry Identities Proofs vs Periodic

The clearest difference is update cadence: Periodic at every 5 weeks against Trigonometry Identities Proofs's every 32 months. Trigonometry Identities Proofs's advantage is price ($0.99 vs $1.99) and iOS requirement (13.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

Trigonometry Identities Proofs costs $0.99 and Periodic $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trigonometry Identities Proofs ships an update every 32 months, Periodic every 5 weeks. The most recent releases landed on August 15, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Trigonometry Identities Proofs | Periodic |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| 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 5 weeks** |
| Monetization | Paid | — |
| Size | 18 MB | 31 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [H3 Apps, LLC](https://appshunter.io/developer/598620927) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Trigonometry Identities Proofs

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

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


### Periodic

[App page](https://appshunter.io/ios/app/periodic-table-elements-pro/id1628646759)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Identities Proofs free?

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

### Is Periodic free?

Periodic costs $1.99, with no in-app purchases.

### Do Trigonometry Identities Proofs or Periodic have ads?

Neither Trigonometry Identities Proofs nor Periodic shows ads.

### Which is updated more often, Trigonometry Identities Proofs or Periodic?

Trigonometry Identities Proofs ships an update every 32 months, and Periodic every 5 weeks. Most recently, Trigonometry Identities Proofs was updated on August 15, 2026 and Periodic on August 16, 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.*