# Ortho Calculator vs 3D

The clearest difference is update cadence: 3D at every 2 months against Ortho Calculator's every 7 months. Ortho Calculator's advantage is iOS requirement (15.0 vs 17.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Ortho Calculator sells 2 in-app purchases, starting at $1.99 per month and 3D sells 3 in-app purchases, starting at $19.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Ortho Calculator ships an update every 7 months, 3D every 2 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Ortho Calculator | 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ortho-calculator/id6736773876/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Subscription | — |
| Size | 67 MB | 45 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Daniel Richmond](https://appshunter.io/developer/1760358030) | [Sidekick Interactive, Inc.](https://appshunter.io/developer/490552471) |

## What reviewers say

### Ortho Calculator

[App page](https://appshunter.io/ios/app/ortho-calculator/id6736773876)

This app provides advanced mathematical tools for orthodontic treatment planning. It offers various calculators to assist dental professionals in making informed decisions, all accessible from a smartphone.

**Highlights:** Maxillary Space Calculator, Mandibular Space Calculator, Expansion Calculator, Extraction Calculator, Space Maintenance Calculator, Surgical Expansion Calculator, Treatment Plan Calculator

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access Monthly | $1.99 | per month |
| All Access Annual | $9.99 | per year |


### 3D

[App page](https://appshunter.io/ios/app/3d-sidekick/id6739503140)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $19.99 | per 7 days |
| Monthly Plan | $49.99 | per month |
| Annual Plan | $499.99 | per year |


## Frequently asked questions

### Is Ortho Calculator free?

Ortho Calculator is free to download, with in-app purchases available.

### Is 3D free?

3D is free to download, with in-app purchases available.

### Do Ortho Calculator or 3D have ads?

Neither Ortho Calculator nor 3D shows ads.

### Which is updated more often, Ortho Calculator or 3D?

Ortho Calculator ships an update every 7 months, and 3D every 2 months. Most recently, Ortho Calculator was updated on October 24, 2026 and 3D on October 28, 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.*