Comparison

Left Off vs Mechanical Sound ID

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

Head to head

Left Off

Free

🔧 Utilities

★ 4.36 ratingsView app →

About

Left Off

Easily log your viewing progress across all your favorite shows and videos. Return to exactly where you stopped watching, regardless of the platform, with this simple tracking tool.

Highlights

Log viewing progress
Resume watching from any point
Supports all platforms
Easy to use interface
Save favorite shows

Features

Read full description

Wish there was an easy way to save where you left off in your favorite shows and videos? Welcome to Left Off! Left Off makes it easy to log where you stopped watching a show, from any platform, so you can return right where you left off watching later!

About

Mechanical Sound ID

Features

Read full description

Identify machines from operating sounds ※Identified machines ・fan >air conditioner, mechanical fan ・vacuum cleaner ・printer ・microwave oven ・telephone ・hair dryer etc.

Screenshots

Left Off4 screens

Mechanical Sound ID1 screens

Verdict

The call

The clearest difference is ads: Left Off at none against Mechanical Sound ID's shown. Mechanical Sound ID's advantage is iOS requirement (15.8.3 vs 17.0). On price, update cadence, 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

Left Off ships an update every 9 days, Mechanical Sound ID fortnightly. Both last shipped on November 4, 2026.

Scorecard2 real differences · 7 level

Left Off versus Mechanical Sound ID: the parameters behind the verdict, then further details
Parameter	Left Off	Mechanical Sound ID
Price	Free	Free
Rating	4.3 (6 ratings) — better	—
Number of ratings	6 — better	—
Update frequency	Every 9 days — better	Fortnightly
Ads	No — better	Yes
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad	iPhone, iPad, iPod — better
Requires iOS	17.0	15.8.3 — better
Further details — not scored
Size	27 MB	36 MB
Age rating	4+	4+
Developer	Jaylen James	Hideaki Uchikoshi

In-app purchases

None

Left Off

No in-app purchases

None

Mechanical Sound ID

No in-app purchases

Questions

Is Left Off free?

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

Is Mechanical Sound ID free?

Mechanical Sound ID is free to download, with no in-app purchases.

Do Left Off or Mechanical Sound ID have ads?

Mechanical Sound ID shows ads; Left Off does not.

Which is updated more often, Left Off or Mechanical Sound ID?

Left Off ships an update every 9 days, and Mechanical Sound ID fortnightly. Most recently, Left Off was updated on November 4, 2026 and Mechanical Sound ID on November 4, 2026.