# ResearchGuide vs ArchCalculator

The clearest difference is update cadence: ResearchGuide at every 3 days against ArchCalculator's every 9 days. ResearchGuide also leads on iOS requirement (13.0 vs 17.2). 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.

ResearchGuide ships an update every 3 days, ArchCalculator every 9 days. Both last shipped on November 4, 2026.

## The numbers

| Metric | ResearchGuide | ArchCalculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 days |
| Size | 17 MB | 2 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Monark IT](https://appshunter.io/developer/1618583329) | [Marsha Alexis Likorawung](https://appshunter.io/developer/1758126922) |

## What reviewers say

### ResearchGuide

[App page](https://appshunter.io/ios/app/researchguide/id6477701498)

**Features:** macOS Compatibility

**In-app purchases:** none


### ArchCalculator

[App page](https://appshunter.io/ios/app/archcalculator/id6554002068)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ResearchGuide free?

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

### Is ArchCalculator free?

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

### Do ResearchGuide or ArchCalculator have ads?

Neither ResearchGuide nor ArchCalculator shows ads.

### Which is updated more often, ResearchGuide or ArchCalculator?

ResearchGuide ships an update every 3 days, and ArchCalculator every 9 days. Most recently, ResearchGuide was updated on November 4, 2026 and ArchCalculator on November 4, 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.*