RIDS calc vs Pretiosa
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RIDS calc
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.
- 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
Read full descriptionHide full description
RIDS simplifies the accurate calculation of several properties of Air, Water, Seawater, and Sugars of various composition. A typical use of RIDS is to calculate the solids level and density of a corn syrup from the refractive index. RIDS employs detailed, published formulations that cover a wide range of conditions while maintaining state-of-the-art accuracy over that range. Detailed air properties and expanded water properties by IF97 international standard
Pretiosa
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.
- Extensive coin catalog
- Global mint collection
- Detailed coin specifications
- High-resolution imagery
- Coin models
- Mints and artists profiles
Read full descriptionHide full description
Discover the world of precious metal coins with Pretiosa. Explore a growing catalog of 20,000+ collectible coins curated from mints across the globe. Pretiosa provides deep numismatic data, high-resolution imagery, and elegantly rendered coin models—designed for serious collectors and enthusiasts. Key Features • Comprehensive Coin Catalog Browse a global collection of precious metal coins from historic and modern mints. Each entry includes detailed specifications, refined descriptions, and high-quality visual references. • Coin Shop Discover and acquire select coins directly within the app through an integrated marketplace experience. • User Profiles & Collection Tracking Create your profile, follow your interests, and build a personalized presence as you explore and manage your collection. • Mints & Artists Explore the creators behind each issue. Follow your preferred mints and artists to stay informed on new releases, design philosophies, and notable works. Download Pretiosa and elevate your collecting experience with deeper insight, discovery, and connection to the art of precious metal coinage.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RIDS calc | Pretiosa |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 5.0 (1 ratings) | 5.0 (6 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 6 — better |
| Update frequency | Every 10 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 11 MB | 1.7 GB |
| Age rating | 4+ | 9+ |
| Developer | Wayne Henderson | Pretiosa Coins |
Customer experience
RIDS calc
Pretiosa
In-app purchases
RIDS calc
No in-app purchases
Pretiosa
No in-app purchases
