DiamondMaster vs GemGuide Pricing
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DiamondMaster
This app provides wholesale diamond pricing and market analysis for professionals. It compares mined and lab-grown diamonds across multiple grading systems and currencies, offering insights into value appreciation and depreciation.
- Compares mined and lab-grown diamonds
- Wholesale value comparisons
- 13 mediums of exchange and 8 C's
- 4 grading systems displayed simultaneously
- Dimension guidelines for shapes and carat weights
- Tracks value appreciation/depreciation
- Global price adjuster
Read full descriptionHide full description
AN ESSENTIAL TOOL FOR DIAMOND PROFESSIONALS, GEMOLOGISTS, APPRAISERS, INVESTORS AND TRADERS OF DIAMONDS. ◆ TIME SAVER: Quickly compares in seconds between diamonds: over 2 million permutations of wholesale values and between Gemological Equivalent "Mined" AND "Lab Grown" Diamond Pricing! "Bright List" from TROY DIAMOND REPORT® developed by Wayne D. Prentice, Graduate Gemologist and former Resident Gemology Instructor at the Gemological Institute of America (GIA) is your next generation Global Wholesale Market Guide on "Mined" and "Lab Grown" Diamonds! Follow Wholesale Diamond Prices in 13 Mediums of Exchange and by 8C's!! The 4C's of Cut Shape, Carat, Color, Clarity, plus "Cut Grade", "Cost", "Change in Value" over the last Year and 5 years and "Creation"! Appreciation Rates (or Depreciation) are calculated on every Mined Diamond Classification, revealing which diamond(s) are maintaining value in your localized market. This App quickly calculates every diamond's total cost, % change-in-value in each selected currency, and exchange to Troy ounces of gold - the universal unit of utility! ◆ 10 Cut Shapes - Round Brilliants and EACH "Fancy Shape" - Pear, Emerald Cut, Princess, Marquise, Oval, Radiant, Cushion, Trilliant & Heart (vs Rapaport's 2) ◆ 46 Carat Categories - from 1 point to 10 carats (vs Rapaport's 18) ◆ 10 Color Grades - D to M (GIA). ◆ 10 Clarity Grades - FL to I-3 (GIA). ◆ 13 Cost References: 11 Currencies - U.S. Dollar (USD), Euro (EUR), Swiss Franc (CHF), Russian Ruble (RUB), Canadian Dollar (CAD), British Pound (GBP), Japanese Yen (JPY), Brazilian Real (BRL), Australian Dollar (AUD), Chinese Yuan/Renminbi (CYN), Indian Rupee (INR), plus value in Exchange to Gold's Annual Moving Average stated in Troy Ounces (XAU) and a "Basket of Currencies Unit" - IMF's Special Drawing Rights (XDR). Whenever a diamond’s wholesale value is changing relative to the "Basket or Gold" it is truly changing! ◆ 4 GRADING SYSTEMS SIMULTANEOUSLY DISPLAYED: Gemological Institute of America (GIA), International Diamond Council (IDC), American Gem Society (AGS), and Russian Grading System (TU). DiamondMaster is the only diamond pricing App that displays all 4 international standards! ◆ Dimension Guidelines on every Shape & Carat Weight - verify properly cut diamond by weight and mm dimensions, compare sizes between Shapes and Budget! ◆ Per Carat and Total Diamond Value ◆ Displays Percentage of Change on “Mined” Diamond values over last year and 5 Years periods! ◆ Understand which Diamond Classifications and Markets are Appreciating or Losing Value at the Highest Rates! ◆ Global Price Adjuster: Reset the wholesale list prices to display to your personal preferences. Wholesalers can display at their desired discount, retailers at their desired premium and investors according to their needs whether selling, buying or evaluating for investment. ◆ Educational-Gemology on every cut shape ◆ Requires iOS 11.0 or later Subscribe to a In-App-Purchase Subscriptions to display the latest "Bright List": ◆ Week - $6.99 USD ◆ Month - $24.99 USD - SAVE 10% ◆ 1/2 Year - $109.99 USD - SAVE 39%! ◆ Year - $199.99 USD - SAVE 45%! • Payment will be charged to iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. —Privacy Policy link: https://www.troydiamondreport.com/diamond-prices/privacy_policy.asp —Terms of Use link: https://www.troydiamondreport.com/diamond-prices/terms_of_use.asp
GemGuide Pricing
This app provides an independent, market-driven benchmark for wholesale pricing of gems and jewelry. Users can view individual stone prices in wholesale or retail and adjust markups. A subscription is required for full functionality.
- Wholesale gem pricing
- Retail gem pricing
- Individual stone price view
- Markup control
- Market-driven benchmark
Read full descriptionHide full description
A reliable benchmark standard for independent, market-driven, accurate wholesale pricing for the gem and jewelry industry. View pricing on individual stones in wholesale or retail, and even control the markups. Note: A Subscription to the GemGuide pricing is required to use this app.
Screenshots
Verdict
The clearest difference is rating: DiamondMaster at 4.0 against GemGuide Pricing's 3.3. DiamondMaster also leads on review sentiment (75% vs 40%) and update cadence (every 5 weeks vs every 69 months). GemGuide Pricing's advantage is in-app purchases (none vs 4). On price, ratings volume, ads 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
Both are free to download. DiamondMaster sells 4 in-app purchases, starting at $6.99 per 7 days. GemGuide Pricing asks for nothing beyond the download.
DiamondMaster holds the better App Store score, 4.0 against 3.3. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews point the same way: 75% of DiamondMaster's written reviews are positive against 40% of GemGuide Pricing's.
DiamondMaster ships an update every 5 weeks, GemGuide Pricing every 69 months. The most recent releases landed on September 19, 2026 and June 1, 2026 respectively.
| Parameter | DiamondMaster | GemGuide Pricing |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (5 ratings) — better | 3.3 (6 ratings) |
| Positive reviews | 75.0% of reviews — better | 40.0% of reviews |
| Number of ratings | 5 | 6 — better |
| Update frequency | Every 5 weeks — better | Every 69 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 35 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Wayne Prentice | Gemworld International, Inc. |
Customer experience
DiamondMaster
GemGuide Pricing
In-app purchases
DiamondMaster
- Wholesale "Bright List" 1 wk.$6.997 Days
- Wholesale "Bright List" 1 mo.$24.991 Month
- Wholesale "Bright List" 6 mo.$109.996 Months
Show 1 moreShow fewer
- Wholesale "Bright List" 1 yr.$199.991 Year
GemGuide Pricing
No in-app purchases
Questions
Is DiamondMaster free?
Is GemGuide Pricing free?
Which has better reviews, DiamondMaster or GemGuide Pricing?
Do DiamondMaster or GemGuide Pricing have ads?
Which is updated more often, DiamondMaster or GemGuide Pricing?
Other comparisons















