# TRIGOMETRIC vs NSA Auction

The clearest difference is update cadence: NSA Auction at every 10 days against TRIGOMETRIC's every 25 months. NSA Auction also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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, NSA Auction every 10 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TRIGOMETRIC | NSA Auction |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 10 days** |
| Size | 135 MB | 92 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 17+ |
| Developer | [TRIGOMETRIC SDN BHD](https://appshunter.io/developer/1533217166) | [APTIV8 IT SOLUTIONS PTE. LTD.](https://appshunter.io/developer/1690551670) |

## 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


### NSA Auction

[App page](https://appshunter.io/ios/app/nsa-auction/id6758945553)

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

**In-app purchases:** none


## Frequently asked questions

### Is TRIGOMETRIC free?

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

### Is NSA Auction free?

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

### Do TRIGOMETRIC or NSA Auction have ads?

Neither TRIGOMETRIC nor NSA Auction shows ads.

### Which is updated more often, TRIGOMETRIC or NSA Auction?

TRIGOMETRIC ships an update every 25 months, and NSA Auction every 10 days. Most recently, TRIGOMETRIC was updated on October 12, 2026 and NSA Auction on October 25, 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.*