# Epicentral vs Isosceles Triangle PRO

The clearest difference is price: Epicentral at Free against Isosceles Triangle PRO's $2.99. Isosceles Triangle PRO's advantage is iOS requirement (15.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Epicentral is free to download; Isosceles Triangle PRO costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Epicentral | Isosceles Triangle PRO |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/isosceles-triangle-pro/id1568944096/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 75.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free** | Paid |
| Size | 16 MB | 180 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Charles Ammon](https://appshunter.io/developer/297487706) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Epicentral

[App page](https://appshunter.io/ios/app/epicentral/id297487703)

Explore global earthquake patterns with real-time data and historical context. View recent seismic events on interactive maps and lists, with detailed summaries and links to official information. Understand current activity within the framework of historical seismicity.

**Highlights:** Real-time earthquake lists, Interactive earthquake maps, Daily, weekly, and monthly data views, Event summaries and details, Links to USGS earthquake information, Historical earthquake catalogs

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

**In-app purchases:** none


### Isosceles Triangle PRO

[App page](https://appshunter.io/ios/app/isosceles-triangle-pro/id1568944096)

Calculate all properties of an isosceles triangle, whether acute or obtuse. Input known values to see formulas and results. Supports decimals, fractions, and step-by-step solutions with history saving and sharing.

**Highlights:** Calculate all isosceles triangle quantities, Display formulas for calculations, Supports acute and obtuse triangles, Handles decimals and fractions, Step-by-step solution display, History function for saved calculations, Adjustable decimal places

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

**In-app purchases:** none


## Frequently asked questions

### Is Epicentral free?

Epicentral is free to download, with no in-app purchases.

### Is Isosceles Triangle PRO free?

Isosceles Triangle PRO costs $2.99, with no in-app purchases.

### Do Epicentral or Isosceles Triangle PRO have ads?

Neither Epicentral nor Isosceles Triangle PRO shows ads.

### Which is updated more often, Epicentral or Isosceles Triangle PRO?

Epicentral ships an update monthly, and Isosceles Triangle PRO monthly. Most recently, Epicentral was updated on October 23, 2026 and Isosceles Triangle PRO on October 21, 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.*