# Rap Calculator vs CARATRATE

The clearest difference is review sentiment: CARATRATE at 100% against Rap Calculator's 40%. CARATRATE also leads on rating (5.0 vs 3.3). Rap Calculator's advantage is iOS requirement (10.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

CARATRATE holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 40% of Rap Calculator's written reviews are positive against 100% of CARATRATE's.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | Rap Calculator | CARATRATE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/rap-calculator/id1390539004/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/caratrate/id1409714486/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 32 MB | 23 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OOZEE TECHNOLOGIES](https://appshunter.io/developer/1017657067) | [Dia Analytics LLP](https://appshunter.io/developer/1409714485) |

## What reviewers say

### Rap Calculator

[App page](https://appshunter.io/ios/app/rap-calculator/id1390539004)

Calculate the value of diamonds using live global pricing and customizable parameters like shape, color, clarity, and carat. Easily update the Rap price list with a single touch to determine diamond prices and broker discounts.

**Highlights:** Live global diamond pricing, Calculate value by shape, color, clarity, carat, One-touch Rap price list updates, Calculate broker discounts, Easy to use for buyers, manufacturers, sellers, brokers

**Features:** macOS Compatibility

**In-app purchases:** none


### CARATRATE

[App page](https://appshunter.io/ios/app/caratrate/id1409714486)

This app simplifies the complex valuation of natural diamonds. It provides users with pricing information to assist in buying or selling diamonds, aiming to make the process straightforward for even experienced traders.

**Highlights:** Diamond valuation, Diamond pricing, Natural diamond focus, Buying/selling assistance, Simple interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Rap Calculator free?

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

### Is CARATRATE free?

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

### Which has better reviews, Rap Calculator or CARATRATE?

CARATRATE is rated higher. Rap Calculator averages 3.3 out of 5 from 4 ratings, while CARATRATE averages 5.0 from 2 ratings.

### Do Rap Calculator or CARATRATE have ads?

Neither Rap Calculator nor CARATRATE shows ads.

### Which is updated more often, Rap Calculator or CARATRATE?

Rap Calculator ships an update every 3 months, and CARATRATE every 3 months. Most recently, Rap Calculator was updated on October 29, 2026 and CARATRATE on October 29, 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.*