Comparison

Challenges vs SONO USG

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

Head to head

Challenges

Monthly Activities Tracking

About

Challenges

Features

Read full description

Welcome to Challenges! The app made for those who want to conquer all their monthly challenges given by the Activity app. Track your progress through elegant graphics and effective reports. Challenges is indispensable for anyone who owns an Apple Watch and is thirsty for challenges. *Challenges requires you to have installed the Activity app and a paired Apple Watch. Some of your health data will need to be collected for the app to work as expected. Some reports can only be viewed after a in-app purchase has been made.

About

SONO USG

Features

Read full description

SONO USG Portable Ultrasound is a wireless, handheld, pocket-sized imaging device. This flexible and feasible APP supports reliable and dependable images for diverse scenarios. Disclaimer - Medical professionals and applications cannot be solely used (must be companioned with medical device). Only qualified healthcare professional can use the device.

Screenshots

Challenges4 screens

SONO USG3 screens

Verdict

The call

The clearest difference is in-app purchases: SONO USG at none against Challenges's 1. Challenges's advantage is update cadence (every 8 days vs every 3 weeks) and iOS requirement (13.4 vs 15.0). On price, 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. Challenges sells 1 one-off in-app purchase. SONO USG asks for nothing beyond the download.

UpkeepUpdate frequency

Challenges ships an update every 8 days, SONO USG every 3 weeks. Both last shipped on October 25, 2026.

Scorecard3 real differences · 3 level

Challenges versus SONO USG: the parameters behind the verdict, then further details
Parameter	Challenges	SONO USG
Price	Free	Free
Update frequency	Every 8 days — better	Every 3 weeks
Ads	No	No
In-app purchases	Yes	No — better
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	13.4 — better	15.0
Further details — not scored
Size	5 MB	276 MB
Age rating	4+	12+
Developer	Felipe Braunger Valio Desenvolvimento de Sistemas Ltda	Leltek

In-app purchases

1 purchases

Challenges

One-time1

Premium access$0.99

None

SONO USG

No in-app purchases

Questions

Is Challenges free?

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

Is SONO USG free?

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

Do Challenges or SONO USG have ads?

Neither Challenges nor SONO USG shows ads.

Which is updated more often, Challenges or SONO USG?

Challenges ships an update every 8 days, and SONO USG every 3 weeks. Most recently, Challenges was updated on October 25, 2026 and SONO USG on October 25, 2026.