# Arc Calculations vs IR

The clearest difference is price: IR at Free against Arc Calculations's $2.99. IR also leads on update cadence (every 3 months vs every 56 months) and iOS requirement (11 vs 16.1). On ads, in-app purchases and device support there is nothing between them.

IR is free to download; Arc Calculations costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arc Calculations ships an update every 56 months, IR every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Arc Calculations | IR |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[1.0 (3 ratings)](https://appshunter.io/ios/app/ir-tracker-v/id1599850915/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 56 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 1 MB | 73 MB |
| Requires iOS | 16.1 | **11** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [zhejiang dali technology co.,ltd](https://appshunter.io/developer/329436737) |

## What reviewers say

### Arc Calculations

[App page](https://appshunter.io/ios/app/arc-calculations/id1491438925)

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

**In-app purchases:** none


### IR

[App page](https://appshunter.io/ios/app/ir-tracker-v/id1599850915)

This app connects to a handheld thermal imaging scope to capture detailed images in low visibility or complete darkness. Its robust design is suitable for outdoor use in various professional and recreational scenarios.

**Highlights:** Connects to handheld thermal imaging scope, Captures rich image information in darkness, Robust design for outdoor use, Suitable for patrol, law enforcement, and search and rescue, Supports hiking and outdoor exploration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Arc Calculations free?

Arc Calculations costs $2.99, with no in-app purchases.

### Is IR free?

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

### Do Arc Calculations or IR have ads?

Neither Arc Calculations nor IR shows ads.

### Which is updated more often, Arc Calculations or IR?

Arc Calculations ships an update every 56 months, and IR every 3 months. Most recently, Arc Calculations was updated on November 3, 2026 and IR on November 3, 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.*