DiamondMaster vs UNI Diamonds
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
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ONE DIAMOND. TWENTY-SEVEN WAYS TO MEASURE ITS VALUE. What changes when you measure a diamond in gold instead of dollars? Or Bitcoin instead of Swiss francs? DiamondMaster helps diamond professionals, gemologists, appraisers, buyers and traders explore wholesale reference values for Mined-Natural and Grown-Created diamonds. Compare classifications, adjust your pricing basis, and see how a different exchange unit changes the picture. Developed by Wayne D. Prentice, Graduate Gemologist and former GIA Resident Gemology Instructor, DiamondMaster brings gemological knowledge and the BrightList wholesale reference guide together on iPhone and iPad. EXPLORE THE 8 C'S Cut Shape, Carat, Color, Clarity, Cut Grade, Cost, Change in Value and Creation—the diamond's natural or laboratory-grown origin. • 10 shapes: Round, Pear, Emerald, Princess, Marquise, Oval, Radiant, Cushion, Trilliant and Heart. • Shape-specific carat selections, with 46 categories for Round, from 0.01 ct through the 10–10.99 ct range. • 10 color grades, D–M, and 10 clarity grades, IF–I-3. • Five cut-grade selections, Excellent through Poor. • Separate natural and lab-grown reference datasets. • Per-carat and total reference values, dimension guidelines, grading descriptions and shape-specific gemological information. 27 COST UNITS WITH BRIGHTLIST Keep the diamond selection. Change the measuring stick. 12 currencies: USD, EUR, JPY, CHF, CAD, GBP, AUD, BRL, RUB, INR, CNY and ZAR. 2 basket references: • XDR: the IMF's Special Drawing Right. • XUNT: DiamondMaster's calculated reference for the proposed gold-and-currency BRICS+ "THE UNIT" basket. 6 precious-metal units: • Gold (XAU), platinum (XPT) and silver (XAG), each by troy ounce. • Gold by gram: Denari (XDEN). • Gold by 100 grams: Centum (XCEN). • Gold by kilogram: Milia (XMIL). 7 crypto assets: Bitcoin (BTC), Ethereum (ETH), Litecoin (LTC), Cardano (ADA), Solana (SOL), PAX Gold (PAXG) and Zcash (ZEC). COMPARE ACROSS TIME Natural-diamond screens show 1-year and 5-year percentage changes in your selected Cost unit. By liberating diamond valuation from the traditional US Dollar peg, the 'Bright List' normalizes a diamond's intrinsic scarcity, extraction costs, and luxury premium across 27 distinct economic units. Whether you are tracking a gem by its 4 C’s or analyzing macro liquidity shifts, our advanced dual-period tracking over 1- and 5-year intervals reveals the true reality of wealth: letting you see instantly whether your diamond is genuinely appreciating, or if your chosen currency is losing its purchasing power. MAKE THE LIST YOUR OWN Use the Global Value Adjuster to apply a discount or premium across diamond calculations. Explore your preferred buying or selling basis, or return to LIST with a 1.00 multiplier. DEMO AND SUBSCRIBER ACCESS Without an active subscription, explore the calculators using older demonstration data and a smaller Cost-unit selection. A BrightList subscription unlocks subscriber diamond reference datasets and all 27 Cost units. Exchange data refreshes on a daily cycle when connectivity and source data allow. Values may use earlier saved or supplied data; this is not a continuous trading feed. SUBSCRIPTIONS Choose from 7-day, 1-month, 6-month or 1-year auto-renewing plans. Current prices and terms appear in the app before purchase. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Renewal is charged within the preceding 24 hours. Manage or cancel in Apple Account settings. Use Restore Subscription to check existing access. Reference values are not individual appraisals, purchase offers or guaranteed resale prices. DiamondMaster does not execute trades. Privacy Policy: https://www.diamondmaster.net/privacy_policy.php Terms of Use: https://www.diamondmaster.net/terms_of_use.php
UNI Diamonds
Access a live marketplace for over 2 million diamonds from hundreds of suppliers. Search by specific criteria, get competitive cash prices, and facilitate secure, insured delivery for immediate purchase.
- Live diamond marketplace
- 2 million+ stones available
- 450+ trusted suppliers
- Search by exact criteria
- Competitive cash prices
- Secure, insured delivery
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UNI puts a live diamond marketplace in your pocket, with over 2 million stones from 450+ trusted suppliers. Search by your exact criteria, get the best cash prices, and find the right stones in seconds from anywhere in the world. Every stone is ready for immediate purchase with secure, fully insured delivery through Malca-Amit. Trade smarter, move inventory faster, and close more deals straight from your phone.
Screenshots
Verdict
The clearest difference is in-app purchases: UNI Diamonds at none against DiamondMaster's 4. UNI Diamonds also leads on update cadence (every 6 days vs every 5 weeks). DiamondMaster's advantage is review sentiment (75% vs 67%). On price, ads, device support and iOS requirement 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. UNI Diamonds asks for nothing beyond the download.
DiamondMaster ships an update every 5 weeks, UNI Diamonds every 6 days. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.
| Parameter | DiamondMaster | UNI Diamonds |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (8 ratings) — better |
| Positive reviews | 75.0% of reviews — better | 66.7% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 5 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Wayne D. Prentice, G.G. | U.N.I Technologies LTD |
Customer experience
DiamondMaster
UNI Diamonds
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
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- Wholesale "Bright List" 1 yr.$199.991 Year
UNI Diamonds
No in-app purchases
Questions
Is DiamondMaster free?
Is UNI Diamonds free?
Do DiamondMaster or UNI Diamonds have ads?
Which is updated more often, DiamondMaster or UNI Diamonds?
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