Comparison

istas21 vs P4Work

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

istas21

Features

Read full description

Esta APP gratuita para móviles y tabletas tiene como objetivo aproximarte a la prevención de riesgos psicosociales. Contestas un cuestionario sobre tus condiciones de trabajo y puedes compartir tus resultados vía WhatsApp, Gmail, BlueMail, Telegram, etc. Se basa en la metodología COPSOQ-ISTAS21 (v3).

About

P4Work

Features

Read full description

The Knowledge Alliance Prevent4Work for Preventing Work-Related Musculoskeletal Disorders aims at establishing a network which will develop innovative educational programmes, adaptive mobile Health tools, high quality evidence-based material and actions that can be implemented in EU to prevent Work-Related Musculoskeletal Disorders, addressing the gap in learning programmes that focus on occupational health, with participation of HEIs, ITC enterprise, educational SMEs and clinical expertise (Prevent4Work Observatory). The target groups are workers and enterprises from different sectors of activity, trainers, health professionals, HEIs and other stakeholders. FAQ's: https://p4work.com/p4work-app/

Screenshots

istas214 screens

P4Work4 screens

Verdict

The call

The clearest difference is update cadence: P4Work at every 3 months against istas21's every 15 months. istas21's advantage is iOS requirement (7.0 vs 13.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

istas21 ships an update every 15 months, P4Work every 3 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level

istas21 versus P4Work: the parameters behind the verdict, then further details
Parameter	istas21	P4Work
Price	Free	Free
Update frequency	Every 15 months	Every 3 months — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	7.0 — better	13.0
Further details — not scored
Size	25 MB	20 MB
Age rating	4+	17+
Developer	SPL SISTEMAS DE INFORMACION, SL	GeoSLab

In-app purchases

None

istas21

No in-app purchases

None

P4Work

No in-app purchases

Questions

Is istas21 free?

istas21 is free to download, with no in-app purchases.

Is P4Work free?

P4Work is free to download, with no in-app purchases.

Do istas21 or P4Work have ads?

Neither istas21 nor P4Work shows ads.

Which is updated more often, istas21 or P4Work?

istas21 ships an update every 15 months, and P4Work every 3 months. Most recently, istas21 was updated on October 26, 2026 and P4Work on October 25, 2026.