Comparison

chmod util vs DNOR

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

Head to head

chmod util

chmod permissions utility

About

chmod util

Features

Read full description

chmod util helps you understand and build Unix file permissions. Tap r, w, and x for the owner, group, and everyone else, and see the corresponding chmod number instantly. Choose common modes such as 644, 755, and 600, each with a clear explanation of who gets access. A built-in, manual explains the essentials: - What read, write, and execute mean. - How permissions differ for files and directories. - How to remember the 4–2–1 rule. - All eight permission patterns in a handy cheat sheet. - Practical examples of chmod commands. A small, focused companion for developers, students, and anyone learning Unix permissions.

About

DNOR

Features

Read full description

DNOR is an intelligent camera client. After purchasing a intelligent camera, you can use this app to connect your camera at any time to view the images of your home or store, and can also communicate with your family at any time.

Screenshots

chmod util3 screens

DNOR4 screens

Verdict

The call

The clearest difference is update cadence: DNOR at every 3 months against chmod util's every 63 months. DNOR also leads on iOS requirement (12.0 vs 17.6). 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

chmod util ships an update every 63 months, DNOR every 3 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level

chmod util versus DNOR: the parameters behind the verdict, then further details
Parameter	chmod util	DNOR
Price	Free	Free
Update frequency	Every 63 months	Every 3 months — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, Mac — better	iPhone, iPod
Requires iOS	17.6	12.0 — better
Further details — not scored
Size	2 MB	140 MB
Age rating	4+	4+
Developer	Mattia Righetti	Yee Hon Cong

In-app purchases

None

chmod util

No in-app purchases

None

DNOR

No in-app purchases

Questions

Is chmod util free?

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

Is DNOR free?

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

Do chmod util or DNOR have ads?

Neither chmod util nor DNOR shows ads.

Which is updated more often, chmod util or DNOR?

chmod util ships an update every 63 months, and DNOR every 3 months. Most recently, chmod util was updated on October 27, 2026 and DNOR on October 25, 2026.