TRIGOMETRIC vs Sky Kirin Auctions
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TRIGOMETRIC
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Trigometric Sdn. Bhd., located in Kuala Lumpur, was established in 1995. The house conducts 2 large public sale a year with focus on Malaysian Banknotes & Coins, in addition with various world banknotes & coins. Our auctions feature rare selections of Malaysian Banknotes and also China and Hong kong specialty banknotes.
Sky Kirin Auctions
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We are an auction company in based in Singapore. We specialize in auctioning numismatics. This app provides flexibility and convenience for customer to view our upcoming bidding item in details. Also once customer is interested, they can do register with us and start bidding anytime and wherever you are. Do contact us if you have any issue registering. With the Sky Kirin Auctions app, you can preview, watch and bid in our auctions from your mobile / tablet device. Participate in our sales while on-the-go and gain access to our following features: • Quick Registration • Following upcoming lots of interest • Push notifications to ensure you engage on items of interest • Track bidding history and activity • Watch live auctions
Screenshots
Verdict
TRIGOMETRIC and Sky Kirin Auctions are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
TRIGOMETRIC ships an update every 25 months, Sky Kirin Auctions every 24 months. The most recent releases landed on August 27, 2026 and September 20, 2026 respectively.
| Parameter | TRIGOMETRIC | Sky Kirin Auctions |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 25 months | Every 24 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 135 MB | 135 MB |
| Age rating | 9+ | 9+ |
| Developer | TRIGOMETRIC SDN BHD | Sky Kirin Pte Ltd |
In-app purchases
TRIGOMETRIC
No in-app purchases
Sky Kirin Auctions
No in-app purchases
Questions
Is TRIGOMETRIC free?
Is Sky Kirin Auctions free?
Do TRIGOMETRIC or Sky Kirin Auctions have ads?
Which is updated more often, TRIGOMETRIC or Sky Kirin Auctions?
Other comparisons
