# Arc+ vs QingTrace Habit

The clearest difference is update cadence: QingTrace Habit at every 9 days against Arc+'s every 4 months. Arc+'s advantage is iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Arc+ sells 1 one-off in-app purchase and QingTrace Habit sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Arc+ ships an update every 4 months, QingTrace Habit every 9 days. The most recent releases landed on October 8, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Arc+ | QingTrace Habit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (113 ratings)](https://appshunter.io/ios/app/arc-plus/id1464058503/reviews)** | — |
| Number of ratings | **113** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 4 MB | 24 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Saad](https://appshunter.io/developer/1291109619) | [开棋 姜](https://appshunter.io/developer/1471317815) |

## What reviewers say

### Arc+

[App page](https://appshunter.io/ios/app/arc-plus/id1464058503)

This utility app helps users calculate various dimensions of circular arcs, including radius, length, width, and height. It offers a simple interface where users input two known values to derive the rest. Additional features include a unit converter, result saving, and sharing capabilities.

**Highlights:** Calculate Radius, Length, Width, Height, Tangent, Input two known values to find others, Measurement units converter, Save results to favorites, Share calculations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Blocker | $4.99 | one-time |


### QingTrace Habit

[App page](https://appshunter.io/ios/app/qingtrace-habit/id6779576177)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QingTrace Pro Monthly | $2.99 | per month |
| QingTrace Pro Yearly | $19.99 | per year |
| QingTrace Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Arc+ free?

Arc+ is free to download, with in-app purchases available.

### Is QingTrace Habit free?

QingTrace Habit is free to download, with in-app purchases available.

### Do Arc+ or QingTrace Habit have ads?

Neither Arc+ nor QingTrace Habit shows ads.

### Which is updated more often, Arc+ or QingTrace Habit?

Arc+ ships an update every 4 months, and QingTrace Habit every 9 days. Most recently, Arc+ was updated on October 8, 2026 and QingTrace Habit on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*