# Data21 vs Linda HQ

The clearest difference is update cadence: Data21 at every 5 days against Linda HQ's every 3 weeks. Linda HQ's advantage is iOS requirement (15.1 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.

Data21 ships an update every 5 days, Linda HQ every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Data21 | Linda HQ |
| --- | --- | --- |
| 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 5 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 34 MB | 67 MB |
| Requires iOS | 26.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Alexandre Alves da Costa](https://appshunter.io/developer/1111954461) | [Growth Foundry LLC](https://appshunter.io/developer/1673126953) |

## What reviewers say

### 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


### Linda HQ

[App page](https://appshunter.io/ios/app/linda-hq/id1673126951)

**In-app purchases:** none


## Frequently asked questions

### Is Data21 free?

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

### Is Linda HQ free?

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

### Do Data21 or Linda HQ have ads?

Neither Data21 nor Linda HQ shows ads.

### Which is updated more often, Data21 or Linda HQ?

Data21 ships an update every 5 days, and Linda HQ every 3 weeks. Most recently, Data21 was updated on October 24, 2026 and Linda HQ on October 25, 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.*