# Data21 vs Profitmark trademark assistant

The clearest difference is update cadence: Data21 at every 5 days against Profitmark trademark assistant's every 2 months. Profitmark trademark assistant's advantage is iOS requirement (15.6 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, Profitmark trademark assistant every 2 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Data21 | Profitmark trademark assistant |
| --- | --- | --- |
| 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 2 months |
| Monetization | Free | — |
| Size | 34 MB | 94 MB |
| Requires iOS | 26.4 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Alexandre Alves da Costa](https://appshunter.io/developer/1111954461) | [Profitmark LLC](https://appshunter.io/developer/1305887597) |

## 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


### Profitmark trademark assistant

[App page](https://appshunter.io/ios/app/profitmark-trademark-assistant/id6503223047)

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

**In-app purchases:** none


## Frequently asked questions

### Is Data21 free?

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

### Is Profitmark trademark assistant free?

Profitmark trademark assistant is free to download, with no in-app purchases.

### Do Data21 or Profitmark trademark assistant have ads?

Neither Data21 nor Profitmark trademark assistant shows ads.

### Which is updated more often, Data21 or Profitmark trademark assistant?

Data21 ships an update every 5 days, and Profitmark trademark assistant every 2 months. Most recently, Data21 was updated on October 24, 2026 and Profitmark trademark assistant on October 19, 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.*