# TRIGOMETRIC vs Sky Kirin Auctions

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.

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 October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | TRIGOMETRIC | Sky Kirin Auctions |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 24 months** |
| Size | 135 MB | 135 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 9+ |
| Developer | [TRIGOMETRIC SDN BHD](https://appshunter.io/developer/1533217166) | [Sky Kirin Pte Ltd](https://appshunter.io/developer/1753278206) |

## What reviewers say

### TRIGOMETRIC

[App page](https://appshunter.io/ios/app/trigometric/id1533217164)

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

**In-app purchases:** none


### Sky Kirin Auctions

[App page](https://appshunter.io/ios/app/sky-kirin-auctions/id6504681994)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is TRIGOMETRIC free?

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

### Is Sky Kirin Auctions free?

Sky Kirin Auctions is free to download, with no in-app purchases.

### Do TRIGOMETRIC or Sky Kirin Auctions have ads?

Neither TRIGOMETRIC nor Sky Kirin Auctions shows ads.

### Which is updated more often, TRIGOMETRIC or Sky Kirin Auctions?

TRIGOMETRIC ships an update every 25 months, and Sky Kirin Auctions every 24 months. Most recently, TRIGOMETRIC was updated on October 29, 2026 and Sky Kirin Auctions on October 30, 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.*