# Digital Circuit Simulator Lite — user reviews > 27 indexed App Store user reviews of Digital Circuit Simulator Lite by Amran AlQasmi, rated 2.83/5 from 29 ratings. - Source: https://appshunter.io/ios/app/digital-circuit-simulator-lite/id1131088003/reviews - App overview in markdown: https://appshunter.io/ios/app/digital-circuit-simulator-lite/id1131088003.md - Rating breakdown: 5★ 7 · 4★ 5 · 3★ 3 · 2★ 4 · 1★ 10 ## Newest reviews (7 of 27) ### 2/5 — Extremely buggy *2023-11-11, version 4.5* Constantly crashes whenever you duplicate, save schematic, etc ### 2/5 — Expensive *2023-03-12* Tou can barely do anything because of the item limit. Which you have to pay for ### 2/5 — Lite *2019-05-08, version 4.4* Please let me know im limited to few gates when getting the app.. ### 2/5 — Runs VERY hot *2019-04-13* And drains the battery at a drastic rate. **Developer response:** The help balloons appears immediately when you start the App, If you follow the help link inside one of the balloons, the you will get full help panel. everything in the app is natural and easy to use, and this is according to the most customers feedback. If you still can't use it, then you may be not specialized in the logics field. ### 3/5 — How to add wires? *2018-02-10, version 2.5* No idea how to add wires ### 2/5 — Useless without premium *2017-09-03* I wasn't able to put more than one AND gate therefore limiting me from building simple circuits, if I did something wrong I will rerate but otherwise it's not worth it. **Developer response:** The app is for test drive only, and it was allowing to put 5 elements of any kind. Now after last update it allows you to put 10 elements of any kind, Please update, and you can also purchase the full version for more. Please retry, and re-rate accordingly. ### 1/5 — Not Useful *2016-10-23* The lite version simply suckers you in to purchase the full version ($2.99 US). I tried to test this app out with a half-adder (5 gates) and didn't have enough room to add the inputs or outputs. Not very a useful test if you can't even put in a simple adder. **Developer response:** the app offers an unlimited design space since day one, simply Drag/Pan the background to scroll the circuit. Please re-rate the app based on real facts, thanks. ## Most critical reviews (10 lowest-rated) ### 1/5 — Can’t build big circuits *2023-07-08* I was going to build a 4 bit adder but by the time I got to the tenth item it was locked behind a paywall, would not get app. ### 1/5 — Garbage waste of time *2020-05-06* Everything locked **Developer response:** Explain your comment please, how everything is locked?, you may tapped the lock button at the lower left corner by mistake.. Please Rate fairly.. ### 1/5 — Free version doesn’t let you preview any functionality *2020-04-29* What am I supposed to do with this thing? I can’t drop a single gate or circuit? How am O supposed to get a feel for whether it’s worth paying for? **Developer response:** you supposed to simulate a complete digital logic circuit, the gates can be added or dropped from the gates menu on the upper toolbar.. just tap 'Gates' menu, and either double tab a gate to drop it, or long tab a gate until it appears under your finger ready to drag it in drag mode.. Help sheet & Help balloons are there to guid you.. Please re-rate fairly.. ### 1/5 — Taking “lite” way too far *2019-10-10, version 4.4* Limit of 10 gates per schematic is ridiculously limited even for a lite version ### 1/5 — Flip flops *2019-02-24, version 4.4* Can you add q and q bar to your flip flops please ### 1/5 — Extremely limited *2018-11-30, version 4.3* Basically useless without full version ### 1/5 — Dont get *2018-09-21* There are probbably better apps than this, its extremely laggy, the graphics are extremely bad, and its very unclear how to actually use the app. **Developer response:** you are probably not specialized in the logics field. ### 1/5 — Needs fix *2018-04-20* The app crashes upon launch. Will re-rate after I’m able to test the app. **Developer response:** Please Check and update to the latest release. and please re-rate accordingly. Thanks. ### 1/5 — Why? *2017-06-30* This is the laggiest app I have ever used, and how are you supposed to connect parts together, you can change the color of the thing that is nonexistent, how does this make sense? **Developer response:** Please long tap a gate to initiate wiring then swipe to the target pin in the target gate. (please read the direction in the help panel). Also the latest update to the free version, allow for more components to be added, and saved. with tons of new features. Please Update, and Re-Rate accordingly. Thanks. ### 1/5 — Freemium *2017-03-19, version 2.0* The free version's functionality is way too limited to be useful at all ## Most praised reviews (10 highest-rated) ### 5/5 — Great App! *2020-04-13* Overall I was really impressed with this app. Some of the controls a little funky to get used to, but it’s definitely worth it to see the logic gate circuits actually working. The best part was seeing the clock timeline and how it all looked together. ### 5/5 — Hardware point of view *2019-02-15, version 4.4* From a hardware point of view it would be good to have the option of using H (high) and L (low) instead of 1 and 0 on the circuit diagrams. Apart from being the “correct” way of doing it, use of H and L provides a better understanding of positive and negative logic. Positive is “asserted high” and negative is “asserted low”. The 1 and 0 correctly belong in tables and charts. [I have long been in the role of providing on-the-job training relating to the introduction of new systems.] ### 5/5 — Function *2018-04-03* I finally know how to use this app and it is so great now that I know how to wire! This app is so fun to use! Good job! P.S thx for telling me how to wire **Developer response:** hi, Thanks for using my app. ### 5/5 — Update: most problems fixed, but iPhone X notch causes problems *2018-03-12* UPDATED REVIEW: The new update fixes most of the problems I originally noted, making this app much more friendly to use 😃. It’s great that the developer listens to and acts on user feedback. However, on the iPhone X many of the top bar’s buttons are mostly blocked by the phone’s “notch”, resulting in users needing to tap randomly in that area and memorize the position of the different functions. Once this bug is fixed I will definitely use this app often. Overall this is a great update, with just this one pain point for some devices. Another nice-to-have but not essential feature would be the ability to open multiple circuits at once and connect them together/combine them, which would allow modular design that could be connected when complete. A good example of its use is with the multiplexer and demultiplexer example circuits, which could be combined together to better demonstrate their function. ORIGINAL REIVEW:This app works, but is not very user friendly. It would be much more useable if you could zoom in an out, as another review mentioned, you can barely fit any useful logic in a single screen before needing to scroll. It would also be useful to have an alternate method to long tapping, for example 3D Touch on iPhone 6s and newer. Also there seems to be no way to move a gate after placing it other than by deleting it and placing another one. (Edit: they can be moved, but it was at first unintuitive how; and not emphasized much in the help page, I did not initially spot it.) With these things fixed and a few other small things (e.g. a typo, the Help menu is labeled "Halp"). Also the developer should really be more kind to users, rather than accusing them of "not having common sense", instead realize that perhaps the app could communicate functionality better. Also it is not made clear what the difference is (if any) between the free and paid versions. The ability to save and load projects is also critical in this sort of app. Overall the app works, but is not user friendly enough for regular use, but with a few minor improvements as mentioned above it could be incredibly useful! I hope the developer takes my advice in this review, this app has the potential to be great! **Developer response:** thanks a lot, please check the new update ### 5/5 — Will it be zoomable in the future? *2017-10-31, version 2.5* Will we be able to zoom and include more components? ### 4/5 — It’s a good app but *2022-03-03* Any time you try to connect something the wires take forever to find the hit box that allows for wires to be connected ### 4/5 — Better *2019-03-11, version 4.4* Tried it again. Work better on my I pad now. ### 4/5 — Once you find out how to do it, it’s great! *2018-04-23* This is as good as doing it on a computer! It has flip flops and all gates. I haven’t built anything yet in it so I will see about lag. Also I’m not for sure if you can create a intergrated circuit. But it’s really good for it being free! Scrolling with a circuit/gate is a bit too fast. **Developer response:** long tap a gate to initiate wiring then swipe to the target pin in the target gate. (please read the direction in the help panel). also flip-flops is there, swipe the toolbar to the left to see them. please re-rate accordingly. ### 4/5 — Great idea, needs some work *2017-10-10* The app idea is great and I wouldn’t mind paying a few dollars for it, however there is some work that needs to be done. The app itself is very laggy, and the controls seem unintuitive. Just slight things like this need to be done. Maybe a grid lock feature where the whole diagram doesn’t fly around when you tap it by accident? Or possibly just two fingers to move the whole thing. Quick animations will make the whole app seem quicker such as clicking where the gates are or the wiring. Overall though, this is the only app of its kind and has a very niche audience. However, the app has a strong foundation and I look forward to future updates and optimizations. **Developer response:** Please check latest update, and review. btw: the lock is in the lower left corner of the plane. ### 3/5 — Good, yet expensive *2019-10-10* It’s a nice app, and I got used to it fairly quickly, yet it’s $8.00 for the full thing. I will consider buying it later as it is late at night, but other than that, keep up the good work! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*