# Multiplier vs Implant Identifier

The clearest difference is update cadence: Implant Identifier at every 3 weeks against Multiplier's every 7 months. Implant Identifier also leads on monetization model (free with in-app purchases vs paid) and ratings volume (189 vs 24). Multiplier's advantage is review sentiment (83% vs 63%) and iOS requirement (13.0 vs 15.5). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for Multiplier against 4.6 for Implant Identifier. That said, the two scores are not equally well evidenced: Implant Identifier has 189 ratings behind it against 24, so its average is the more settled of the two. Written reviews are what separate them: 83% of Multiplier's written reviews are positive against 63% of Implant Identifier's.

Multiplier ships an update every 7 months, Implant Identifier every 3 weeks. The most recent releases landed on July 2, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Multiplier | Implant Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (24 ratings)](https://appshunter.io/ios/app/multiplier/id460335161/reviews)** | [4.6 (189 ratings)](https://appshunter.io/ios/app/implant-identifier/id1343366864/reviews) |
| Number of ratings | 24 | **189** |
| Positive reviews | **83.3% of reviews** | 63.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 62 MB | 128 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [LifeBridge Health](https://appshunter.io/developer/460335164) | [Devise Health](https://appshunter.io/developer/1006656243) |

## What reviewers say

### Multiplier

[App page](https://appshunter.io/ios/app/multiplier/id460335161)

This app automates complex calculations for predicting mature height, bone length, and limb length discrepancies in children. It simplifies manual methods, reducing calculation time and errors for various orthopedic and growth-related assessments.

**Highlights:** Predict mature height, Calculate bone length, Assess limb length discrepancy, Analyze growth remaining, Plot height on CDC charts, Scanogram calculations, Foot length analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Implant Identifier

[App page](https://appshunter.io/ios/app/implant-identifier/id1343366864)

Instantly identify orthopedic and spine implants from X-rays using AI. This app helps medical professionals recognize unknown implants, access a community of experts, and contribute to a growing library of implant data. Features include AI identification for hips, a community feed for assistance, and a filterable implant library.

**Highlights:** AI-Identify for Hips, Community Feed for Expert Help, Filterable Implant Library, Submit New Implants, My Implants History, X-ray Recognition

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Multiplier free?

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

### Is Implant Identifier free?

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

### Which has better reviews, Multiplier or Implant Identifier?

Multiplier is rated higher. Multiplier averages 4.6 out of 5 from 24 ratings, while Implant Identifier averages 4.6 from 189 ratings.

### Do Multiplier or Implant Identifier have ads?

Neither Multiplier nor Implant Identifier shows ads.

### Which is updated more often, Multiplier or Implant Identifier?

Multiplier ships an update every 7 months, and Implant Identifier every 3 weeks. Most recently, Multiplier was updated on July 2, 2026 and Implant Identifier on September 26, 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.*