# ARCA Audits vs Data21

The clearest difference is update cadence: Data21 at weekly against ARCA Audits's every 3 months. ARCA Audits's advantage is iOS requirement (12.0 vs 26.4). 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.

ARCA Audits ships an update every 3 months, Data21 weekly. The most recent releases landed on June 1, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | ARCA Audits | Data21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/data21/id1350287433/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Free |
| Size | 26 MB | 34 MB |
| Requires iOS | **12.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Formability Ltd](https://appshunter.io/developer/495672823) | [Alexandre Alves da Costa](https://appshunter.io/developer/1111954461) |

## What reviewers say

### ARCA Audits

[App page](https://appshunter.io/ios/app/arca-audits/id1098199287)

**In-app purchases:** none


### Data21

[App page](https://appshunter.io/ios/app/data21/id1350287433)

This application allows users to anonymously mark and collect important data and feedback about their products and businesses. It's designed to help businesses gather insights for investment, sales, and purchasing decisions.

**Highlights:** Anonymous data collection, Product feedback gathering, Business insights, Investment data support, Sales improvement data, Purchasing optimization data

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

**In-app purchases:** none


## Frequently asked questions

### Is ARCA Audits free?

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

### Is Data21 free?

Data21 is free to download, with no in-app purchases.

### Do ARCA Audits or Data21 have ads?

Neither ARCA Audits nor Data21 shows ads.

### Which is updated more often, ARCA Audits or Data21?

ARCA Audits ships an update every 3 months, and Data21 weekly. Most recently, ARCA Audits was updated on June 1, 2026 and Data21 on September 24, 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.*