# Ortho Calculator vs AlignerTime

The clearest difference is rating: Ortho Calculator at 5.0 against AlignerTime's 4.4. Ortho Calculator also leads on review sentiment (100% vs 89%) and iOS requirement (15.0 vs 18.6). AlignerTime's advantage is monetization model (freemium vs subscription) and update cadence (every 3 weeks vs every 7 months). 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 AlignerTime sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Ortho Calculator holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: AlignerTime has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Ortho Calculator's written reviews are positive against 89% of AlignerTime's.

Ortho Calculator ships an update every 7 months, AlignerTime every 3 weeks. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Ortho Calculator | AlignerTime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ortho-calculator/id6736773876/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/alignertime-aligner-tracker/id6762070275/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | **100.0% of reviews** | 88.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Subscription | **Freemium** |
| Size | 67 MB | 90 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 17+ | 12+ |
| Developer | [Daniel Richmond](https://appshunter.io/developer/1760358030) | [卓学 陈](https://appshunter.io/developer/1892756052) |

## 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 |


### AlignerTime

[App page](https://appshunter.io/ios/app/alignertime-aligner-tracker/id6762070275)

Track your clear aligner or retainer wear time with a simple timer and photo timeline. Manage tray changes, build consistent habits, and visualize your smile's progress privately on your device.

**Highlights:** Aligner wear time tracking, Tray change management, Progress photo timeline, Daily wear habit building, Gentle reminders, Private, on-device data storage

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| BraceTime Pro Annual | $23.99 | per year |
| Yearly Subscription | $29.99 | per year |
| Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Ortho Calculator free?

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

### Is AlignerTime free?

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

### Which has better reviews, Ortho Calculator or AlignerTime?

Ortho Calculator is rated higher. Ortho Calculator averages 5.0 out of 5 from 1 ratings, while AlignerTime averages 4.4 from 8 ratings.

### Do Ortho Calculator or AlignerTime have ads?

Neither Ortho Calculator nor AlignerTime shows ads.

### Which is updated more often, Ortho Calculator or AlignerTime?

Ortho Calculator ships an update every 7 months, and AlignerTime every 3 weeks. Most recently, Ortho Calculator was updated on November 4, 2026 and AlignerTime on November 9, 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.*