Comparison

Smart Oud vs Engine Sim

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

Head to head
About

Smart Oud

Experience the authentic sound of the East with this virtual lute instrument. Learn to play traditional melodies and create new musical concepts. Share your compositions easily on social media.

Highlights
  • Authentic lute sound
  • Create and share tunes
  • Scales and notes
  • Piano with oud sounds
  • File manager
Features
Read full description

-The short-neck lute instrument, a genuine sound of the east, is now offered in a handy app. -Free Oud is the leading musical app that allows younger generations to understand contemporary arts and employ traditional musical instruments to achieve new musical concepts. -99% Acoustic oud, like no other sound. create your tunes and share them on social media Engage Audio features, Scales, Notes, File Manager & Piano with oud sounds. ALL FREE

About

Engine Sim

Experience realistic engine sounds with interactive controls. Explore a variety of engines, from kei cars to V12s, and feel the vibrations. Practice gear shifting and rev-matching for an immersive automotive simulation.

Highlights
  • 10 realistic engine sounds
  • Interactive throttle control
  • Live engine sound generation
  • Straight-pipe mode
  • Haptic feedback
  • H-pattern shifter and paddles
  • Rev-matching practice
Features
Read full description

Press the pedal and the engine roars for real. Just move your finger and 21 different engines come alive — from a 660cc turbo kei car to a W16 hypercar, all the way to a racing V10 that screams to 19,000 rpm. It's a new kind of toy you can just pick up and play. No complicated setup. Drag across the screen and feel how good a good engine sounds. SIMPLE TO PLAY, DEEP IF YOU WANT IT - 21 engine sounds: V-twin, turbo kei car (660cc), inline-4, inline-5, inline-6, boxer-4, flat-6, V6, cross-plane and flat-plane V8s, V10, V12, W16, and a racing V10 to 19,000 rpm - A throttle that reacts to exactly how hard you press: ease in for a soft idle, floor it for a full-throttle scream - Every sound is made live, not a recording on loop — so the same rev never sounds exactly the same twice - Straight-pipe mode in the chassis tuning screen: open up the exhaust for more pops and bangs on lift-off - Haptics that pulse with the revs, so you feel the engine in your hand - Color RPM gauge with a rev-limiter cutout FOR CAR PEOPLE, THERE'S MORE - An H-pattern shifter (switch to paddles anytime) so you change gears yourself - Practice rev-matching: brake, blip the throttle, shift. Nail it and it's smooth; botch it and you feel the driveline thump - Per-cylinder firing and uneven exhaust timing keep it from ever sounding like a loop - Tune each engine: spend miles earned by driving on mufflers, intakes, headers, superchargers, cams and ECU maps, and see your 0–100 km/h (0–62 mph) time, top speed and torque change on the spot - Chassis tuning shared across every engine: weight reduction, aero and a lighter flywheel - A Parts Crate for extra parts, with the odds shown in the app - Garage miles keep accruing even while the app is closed - A Pit Stop summary after every drive: distance, miles earned, and any personal bests - Daily tasks, a login bonus, and achievements you can trade in for perks - Game Center leaderboards for top speed and 0–100 km/h - Invite friends with a referral code for bonus miles WHO IT'S FOR - Anyone who loves engine and car sounds - Anyone who wants a bit of fun tinkering with a car while waiting or on the go - Fans curious what a V12 or flat-6 sounds like without owning one - Drivers who want to practice rev-matching before getting behind the wheel AVAILABILITY You start with the inline-4 and every core feature, with no ads on the driving screen. Driving earns miles that unlock the remaining engines and parts through the unlock tree. The next unowned V6, V8 or V12 engine can be rented for 10 minutes after a short video ad, and straight-pipe mode can be unlocked for 24 hours the same way. An optional one-time purchase removes the full-screen ads shown between engine switches; rentals, straight-pipe trials and mile rewards stay available either way. No subscriptions. Tip: headphones or earphones bring out the fine detail in every sound.

Screenshots

Smart Oud1 screens
Engine Sim4 screens

Verdict

The call

The clearest difference is rating: Engine Sim at 4.7 against Smart Oud's 4.1. Engine Sim also leads on update cadence (every 3 days vs every 10 months) and chart position (#77 vs unranked). Smart Oud's advantage is in-app purchases (none vs 10) and device support (3 vs 1). On price, review sentiment, ratings volume and ads 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. Engine Sim sells 10 one-off in-app purchases. Smart Oud asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Engine Sim holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 207 and 73 respectively. Written reviews point the same way: 80% of Smart Oud's written reviews are positive against 86% of Engine Sim's.

UpkeepUpdate frequency

Smart Oud ships an update every 10 months, Engine Sim every 3 days. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 5 level
Smart Oud versus Engine Sim: the parameters behind the verdict, then further details
ParameterSmart OudEngine Sim
PriceFreeFree
Rating4.1 (207 ratings)4.7 (73 ratings) — better
Positive reviews80.0% of reviews85.7% of reviews — better
Number of ratings207 — better73
Update frequencyEvery 10 monthsEvery 3 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#77 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size26 MB43 MB
Age rating4+4+
DeveloperHossam AfifySena Takasawa

Customer experience

Smart Oud

All ratings207 ratings
Positive75.8%
Neutral5.3%
Negative18.8%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Engine Sim

All ratings73 ratings
Positive93.2%
Neutral2.7%
Negative4.1%
Written reviews21 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

In-app purchases

None

Smart Oud

No in-app purchases

10 purchases

Engine Sim

One-time10
  • Quick Shifter$1.99
  • Big Radiator$1.99
  • Over-Rev Kit$1.99
Show 7 more
  • Single 450 Moto$1.99
  • Today's Engine (I6/V8)$1.99
  • Big Bore Kit$2.99
  • Custom Gearbox$3.99
  • Today's Engine (V10/V12)$4.99
  • Straight Pipe$5.99
  • Pro Parts Pack$9.99

Questions

Is Smart Oud free?
Smart Oud is free to download, with no in-app purchases.
Is Engine Sim free?
Engine Sim is free to download, with in-app purchases available.
Which has better reviews, Smart Oud or Engine Sim?
Engine Sim is rated higher. Smart Oud averages 4.1 out of 5 from 207 ratings, while Engine Sim averages 4.7 from 73 ratings.
Do Smart Oud or Engine Sim have ads?
Both Smart Oud and Engine Sim show ads.
Which is updated more often, Smart Oud or Engine Sim?
Smart Oud ships an update every 10 months, and Engine Sim every 3 days. Most recently, Smart Oud was updated on October 7, 2026 and Engine Sim on October 15, 2026.

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