Comparison

Trans4motor S vs SQL

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

Head to head
About

Trans4motor S

Explore the inner workings of various four-stroke aircraft engines through detailed CG animations. Experience realistic engine sounds, throttle control, and interactive modes like cutaway views and engine start-up simulations. Learn about engine mechanics and history.

Highlights
  • Transform between engine types
  • Realistic engine sound and throttle control
  • Cutaway view of engine internals
  • Virtual engine start-up procedure
  • Interactive movie presentations
  • Machine gun firing simulation
Features
Read full description

"Trans4motor S" is the reciprocating aircraft engine simulator. You can operate a wide range of four-stroke engines from the Wright brothers' inline 4 cylinders to the radial, inverted V, W, and H-type on your iPad/iPhone. Recommended to anyone interested in car and motorcycle engines. This is for those who have a relentless love for engines and want to enhance their knowledge. Relive the development of the glorious reciprocating aircraft engine. https://www.youtube.com/user/Trans4motor https://www.facebook.com/Trans4motor Features 1) Seamlessly transforms into different types of engines Select from Radial to V-type, or V-type to inverted V-type, etc., and watch the running engines transform over continuous CG animation. You can enjoy watching pistons, connecting rods, camshafts, valves, and many other parts rotate, separate, and combine to make a variety of engine forms. 2) Engine sound and throttle control. Developed in technical collaboration with Sound Design Lab, the developer of the innovative engine sound application "RealEngineSim", based on the SDL method of engine sound synthesis, this new feature brings a new level of engine sound synthesis for aircraft. You can experience realistic and powerful engine sounds include, of course, the different numbers of cylinders, the difference between air-cooled and liquid-cooled engines, and the interference sound caused by the rotation of propellers. In addition, a sophisticated aircraft engine physics model is available in this new version. It calculates the engine speed based on the engine torque and rotational resistance due to the air resistance depending on the diameter and number of propellers in real time. Please try the realistic throttle operation. 3) Cutaway mode You can view the inside of the air-cooling fins and crankcase of the running engine by cutting them horizontally and vertically in real-time. 4) Engine start-up mode Turn the starter handle manually, increase the speed of the inertia starter and contact the clutch! In this mode, you can virtually experience the engine start-up procedure. 5) Machine gun mode In this mode, you can test-fire the "Type 97 aircraft machine gun" of the "Sakae" engine installed in the Zero fighter, the "MG 151/20" of the "DB 601" engine installed in the "Messerschmitt Bf 109". You can also learn how the propeller synchronize system works in super slow motion. 6) Interactive Movie ·Four-stroke engines ·Cam and Gear ·Gun ·Sleeve Valve Recorded 4 controllable presentation videos. Additional functions planned in the future. ·R-4360 Wasp Major will be available soon. ·Adding function to import 360° background images (HDRI files). The CG animated engine rotates at one tenth of the actual speed to enable users to learn the structure and to enjoy the visual. This application is based on a representation of the engine specifications available to the public for learning purposes, and is not a precise rendition of the dimensions and design of the actual machine. The company and product names used within the application are generally registered trademarks or trademarks of the respective companies.

About

SQL

Design, draw, and share entity relationship diagrams with this app. Generate SQL scripts from your diagrams and access study pages for SQL topics and syntax. Perfect for learning SQL graphically and textually.

Highlights
  • Design and draw ER diagrams
  • Generate SQL scripts from diagrams
  • Customizable canvas size
  • Automatic local saving
  • Study pages for SQL topics
  • Learn SQL syntax pages
Features
Read full description

The SQLERDiagram is a feature rich app designed by an engineer. The SQLERDiagram is carefully designed to be a simple and elegant app. Easy to use, easy to understand, simple and effective. This app allows the creative smart people like you to design, draw, and share entity relationship diagram. You can also generate a SQL script for the ER diagram and then copy or share the SQL script. Canvas's size can be customized (increase horizontally or vertically) if you need more space to draw ER diagram. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. This is a perfect app if you are learning SQL. There a Study page to help you with learning some important SQl topics. There is also a LearnSyntax page to help you with learning some important SQl syntaxes. Sharpen you brain by using this app and learning about the SQL using both graphically (diagram) and textually (script). Be creative. Enjoy the app!

Screenshots

Trans4motor S4 screens
SQL4 screens

Verdict

The call

The clearest difference is review sentiment: Trans4motor S at 50% against SQL's 0%. Trans4motor S also leads on rating (4.6 vs 1.0) and update cadence (weekly vs every 5 weeks). On price, ads, in-app purchases and monetization model 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

Trans4motor S costs $5.99 and SQL $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Trans4motor S holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Trans4motor S has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Trans4motor S's written reviews are positive against 0% of SQL's.

UpkeepUpdate frequency

Trans4motor S ships an update weekly, SQL every 5 weeks. The most recent releases landed on October 17, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 6 level
Trans4motor S versus SQL: the parameters behind the verdict, then further details
ParameterTrans4motor SSQL
Price$5.99$5.99
Rating4.6 (19 ratings) — better1.0 (1 ratings)
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings19 — better1
Update frequencyWeekly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.1 — better15.1
Further details — not scored
Size127 MB31 MB
Age rating4+4+
DeveloperKitt Peak, Inc.Om Prakash Chapagain

Customer experience

Trans4motor S

All ratings19 ratings
Positive89.5%
Neutral0.0%
Negative10.5%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

SQL

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Trans4motor S

No in-app purchases

None

SQL

No in-app purchases

Questions

Is Trans4motor S free?
Trans4motor S costs $5.99, with no in-app purchases.
Is SQL free?
SQL costs $5.99, with no in-app purchases.
Which has better reviews, Trans4motor S or SQL?
Trans4motor S is rated higher. Trans4motor S averages 4.6 out of 5 from 19 ratings, while SQL averages 1.0 from 1 ratings.
Do Trans4motor S or SQL have ads?
Neither Trans4motor S nor SQL shows ads.
Which is updated more often, Trans4motor S or SQL?
Trans4motor S ships an update weekly, and SQL every 5 weeks. Most recently, Trans4motor S was updated on October 17, 2026 and SQL on September 24, 2026.

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