Data21 vs Linda HQ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Data21
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.
- Anonymous data collection
- Product feedback gathering
- Business insights
- Investment data support
- Sales improvement data
- Purchasing optimization data
Read full descriptionHide full description
Software Patent/INPI Register : BR 512021000013-7. In this application you can mark and collect important (anonymously) data and feedbacks about your product and business. The largest companies in the world collect data to receive bigger investments, to sell more and buy better (Nesse aplicativo você pode marcar e coletar importantes dados anônimos e feedbacks sobre o seu produto e negócio. As maiores empresas do mundo coletam dados para receber maiores investimentos, pra vender mais e comprar melhor.
Linda HQ
Read full descriptionHide full description
Linda HQ's suite of tools have been tailored to meet the needs of today's business owners. Our software allows you to track your rankings, monitor your reputation, organize your leads, and respond to customers and prospects in real-time. Linda HQ is a digital marketing Swiss army knife that will help you grow your revenue.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Data21 | Linda HQ |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 34 MB | 67 MB |
| Age rating | 17+ | 4+ |
| Developer | Alexandre Alves da Costa | Growth Foundry LLC |
In-app purchases
Data21
No in-app purchases
Linda HQ
No in-app purchases
