Comparison

Holyiot vs Contour Detection

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

Head to head

About

Holyiot

Features

Read full description

A device firmware upgrade application

About

Contour Detection

Features

Read full description

Detects the contours of the edges of an image.

Screenshots

Holyiot3 screens

Contour Detection2 screens

Verdict

The call

The clearest difference is ads: Holyiot at none against Contour Detection's shown. Holyiot also leads on iOS requirement (12.0 vs 17.7.2). Contour Detection's advantage is update cadence (fortnightly vs every 24 months). On price, 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

Holyiot ships an update every 24 months, Contour Detection fortnightly. The most recent releases landed on September 20, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 3 level

Holyiot versus Contour Detection: the parameters behind the verdict, then further details
Parameter	Holyiot	Contour Detection
Price	Free	Free
Update frequency	Every 24 months	Fortnightly — better
Ads	No — better	Yes
In-app purchases	No	No
Devices	iPhone, iPod — better	iPhone
Requires iOS	12.0 — better	17.7.2
Further details — not scored
Size	16 MB	36 MB
Age rating	4+	4+
Developer	Shenzhen Hong yi yun jia technology Co.,LTD	Hideaki Uchikoshi

In-app purchases

None

Holyiot

No in-app purchases

None

Contour Detection

No in-app purchases

Questions

Is Holyiot free?

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

Is Contour Detection free?

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

Do Holyiot or Contour Detection have ads?

Contour Detection shows ads; Holyiot does not.

Which is updated more often, Holyiot or Contour Detection?

Holyiot ships an update every 24 months, and Contour Detection fortnightly. Most recently, Holyiot was updated on September 20, 2026 and Contour Detection on October 15, 2026.