# RIDS calc vs Pretiosa

The clearest difference is price: RIDS calc at Free against Pretiosa's $3.99. RIDS calc also leads on iOS requirement (13.0 vs 26.0). Pretiosa's advantage is update cadence (weekly vs every 10 months) and ratings volume (6 vs 1). On rating, ads, in-app purchases and device support there is nothing between them.

RIDS calc is free to download; Pretiosa costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for RIDS calc against 5.0 for Pretiosa. That said, the two scores are not equally well evidenced: Pretiosa has 6 ratings behind it against 1, so its average is the more settled of the two.

RIDS calc ships an update every 10 months, Pretiosa weekly. Both last shipped on November 3, 2026.

## The numbers

| Metric | RIDS calc | Pretiosa |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rids-calc/id1513200801/reviews) | [5.0 (6 ratings)](https://appshunter.io/ios/app/pretiosa/id1576468481/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 11 MB | 1.7 GB |
| Requires iOS | **13.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Wayne Henderson](https://appshunter.io/developer/1265636597) | [Pretiosa Coins](https://appshunter.io/developer/1576468483) |

## What reviewers say

### RIDS calc

[App page](https://appshunter.io/ios/app/rids-calc/id1513200801)

This app accurately calculates properties for air, water, seawater, and sugars. It uses detailed, published formulations for precise results across various conditions, including solids level and density of corn syrup.

**Highlights:** Accurate property calculations, Supports air, water, seawater, and sugars, Calculates solids level and density, Uses detailed published formulations, State-of-the-art accuracy, Includes detailed air and expanded water properties

**Features:** macOS Compatibility

**In-app purchases:** none


### Pretiosa

[App page](https://appshunter.io/ios/app/pretiosa/id1576468481)

Explore a vast catalog of over 19,900 collectible precious metal coins from global mints. Access in-depth numismatic data, high-resolution imagery, and detailed coin models to enhance your collecting experience.

**Highlights:** Extensive coin catalog, Global mint collection, Detailed coin specifications, High-resolution imagery, Coin models, Mints and artists profiles

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

**In-app purchases:** none


## Frequently asked questions

### Is RIDS calc free?

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

### Is Pretiosa free?

Pretiosa costs $3.99, with no in-app purchases.

### Which has better reviews, RIDS calc or Pretiosa?

RIDS calc and Pretiosa are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.

### Do RIDS calc or Pretiosa have ads?

Neither RIDS calc nor Pretiosa shows ads.

### Which is updated more often, RIDS calc or Pretiosa?

RIDS calc ships an update every 10 months, and Pretiosa weekly. Most recently, RIDS calc was updated on November 3, 2026 and Pretiosa on November 3, 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.*