# CongruenceIndexApp vs Orthopedic Angles Calculator

The clearest difference is price: CongruenceIndexApp at $0.99 against Orthopedic Angles Calculator's $9.99. Orthopedic Angles Calculator's advantage is iOS requirement (14.0 vs 18.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

CongruenceIndexApp costs $0.99 and Orthopedic Angles Calculator $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CongruenceIndexApp ships an update every 9 months, Orthopedic Angles Calculator every 13 months. The most recent releases landed on November 8, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | CongruenceIndexApp | Orthopedic Angles Calculator |
| --- | --- | --- |
| Price | **$0.99** | $9.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 13 months |
| Size | 1 MB | 4 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 12+ |
| Developer | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) | [Ahmad Al Hariri](https://appshunter.io/developer/1648019898) |

## What reviewers say

### CongruenceIndexApp

[App page](https://appshunter.io/ios/app/congruenceindexapp/id1316760196)

**Features:** Vision Pro support

**In-app purchases:** none


### Orthopedic Angles Calculator

[App page](https://appshunter.io/ios/app/orthopedic-angles-calculator/id6743616080)

**In-app purchases:** none


## Frequently asked questions

### Is CongruenceIndexApp free?

CongruenceIndexApp costs $0.99, with no in-app purchases.

### Is Orthopedic Angles Calculator free?

Orthopedic Angles Calculator costs $9.99, with no in-app purchases.

### Do CongruenceIndexApp or Orthopedic Angles Calculator have ads?

Neither CongruenceIndexApp nor Orthopedic Angles Calculator shows ads.

### Which is updated more often, CongruenceIndexApp or Orthopedic Angles Calculator?

CongruenceIndexApp ships an update every 9 months, and Orthopedic Angles Calculator every 13 months. Most recently, CongruenceIndexApp was updated on November 8, 2026 and Orthopedic Angles Calculator on November 6, 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.*