# 居民积分 vs Trigr

The clearest difference is price: 居民积分 at Free against Trigr's $1.99. 居民积分 also leads on iOS requirement (12.0 vs 16.1). Trigr's advantage is update cadence (daily vs every 3 weeks). On ads, in-app purchases and device support there is nothing between them.

居民积分 is free to download; Trigr costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

居民积分 ships an update every 3 weeks, Trigr daily. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 居民积分 | Trigr |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trigr-trigonometry-solver/id6448587882/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | — | Paid |
| Size | 37 MB | 66 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [湖北点赞积分科技有限公司](https://appshunter.io/developer/1575331975) | [Evolv Developments Pty. Ltd.](https://appshunter.io/developer/1679865917) |

## What reviewers say

### 居民积分

[App page](https://appshunter.io/ios/app/id1629190856)

**Features:** macOS Compatibility

**In-app purchases:** none


### Trigr

[App page](https://appshunter.io/ios/app/trigr-trigonometry-solver/id6448587882)

This app quickly solves for all unknown measurements of right-angle and isosceles triangles using just two known values. It's designed for students, engineers, and builders needing accurate triangle calculations.

**Highlights:** Solves right-angle and isosceles triangles, Calculates all unknown measurements, Requires only two known values, User-friendly interface, Accurate calculations

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

**In-app purchases:** none


## Frequently asked questions

### Is 居民积分 free?

居民积分 is free to download, with no in-app purchases.

### Is Trigr free?

Trigr costs $1.99, with no in-app purchases.

### Do 居民积分 or Trigr have ads?

Neither 居民积分 nor Trigr shows ads.

### Which is updated more often, 居民积分 or Trigr?

居民积分 ships an update every 3 weeks, and Trigr daily. Most recently, 居民积分 was updated on October 9, 2026 and Trigr on October 21, 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.*