Comparison

US MSK vs Doc Duty

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

Head to head

De médico para médico

Free

🏥 Medical

No ratingsView app →

About

US MSK

This medical app serves as an atlas for musculoskeletal ultrasound imaging of the upper and lower limbs. It provides detailed visual guidance for diagnostic procedures. The app offers a free trial for its subscription plans.

Highlights

Musculoskeletal ultrasound atlas
Upper limb imaging
Lower limb imaging
Diagnostic guidance
Free trial available

Features

Read full description

Atlas de Ultrassonografia dos membros superiores e inferiores. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Doc Duty

Features

Read full description

De médico para médico, encontre de forma fácil e organizada uma oportunidade de trabalho. De paciente para médico, encontre a solução para seu problema de saúde diretamente com o profissional especialista de sua região. - crie ofertas de plantões; - gerencie grupos de médicos; - organize sua agenda; Prático, simples e rápido.

Screenshots

US MSK3 screens

Doc Duty4 screens

Verdict

The call

The clearest difference is in-app purchases: Doc Duty at none against US MSK's 2. US MSK's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, ads 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. US MSK sells 2 in-app purchases, starting at $0.99 per month. Doc Duty asks for nothing beyond the download.

UpkeepUpdate frequency

US MSK ships an update every 6 weeks, Doc Duty every 3 weeks. The most recent releases landed on October 4, 2026 and October 18, 2026 respectively.

Scorecard2 real differences · 6 level

US MSK versus Doc Duty: the parameters behind the verdict, then further details
Parameter	US MSK	Doc Duty
Price	Free	Free
Positive reviews	50.0% of reviews	—
Update frequency	Every 6 weeks	Every 3 weeks — better
Ads	No	No
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	—
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	13.0 — better	15.1
Further details — not scored
Size	31 MB	36 MB
Age rating	17+	4+
Developer	Azul Systems	GILBERTO ZINN SCHUTZ FILHO

In-app purchases

2 purchases

US MSK

Subscriptions2

Monthly1 Month trial$0.991 Month
Annual1 Month trial$9.991 Year

None

Doc Duty

No in-app purchases

Questions

Is US MSK free?

US MSK is free to download, with in-app purchases available.

Is Doc Duty free?

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

Do US MSK or Doc Duty have ads?

Neither US MSK nor Doc Duty shows ads.

Which is updated more often, US MSK or Doc Duty?

US MSK ships an update every 6 weeks, and Doc Duty every 3 weeks. Most recently, US MSK was updated on October 4, 2026 and Doc Duty on October 18, 2026.