# CRUMB — user reviews > 33 indexed App Store user reviews of CRUMB by Vital Group Limited, rated 4.40/5 from 138 ratings. - Source: https://appshunter.io/ios/app/crumb/id1639868071/reviews - App overview in markdown: https://appshunter.io/ios/app/crumb/id1639868071.md - Rating breakdown: 5★ 100 · 4★ 18 · 3★ 4 · 2★ 6 · 1★ 10 ## Newest reviews (10 of 33) ### 2/5 — Need improvements *2024-09-22, version 1.0.3* Can’t plug power supply, no tutorials how to use it ### 4/5 — Great simulator, just wish it had more *2023-10-24, version 1.0.3* Needed an amplifier, but didn’t have one ### 2/5 — Please fix these bugs *2023-10-23, version 1.0.3* I love the app but please fix these bugs. I’ve rated this low to get the attention of the developer. Otherwise, it’s a great app. 1. Component images do not rotate making it difficult to tell if the logic has switched. 2. The power rails are backwards related to real life breadboards. 3. Program counters (74HC161) do not reset to 0 on a reset signal, despite the claim of the data sheet. 4. 74HC245 enable pin should be labeled active low but it’s not. 5. EEPROM sometimes corrupts the data saved in the HEX editor. Usually it resets an address to 00. Technically, a cleared EEPROM should have all addresses set to 01 by default (not a big deal but this is what’s technically correct). 6. Many components, most commonly the transistor, lock their image in place even if deleted. It takes resetting the App to make the image go away, even when starting a new file. 7. Usually when in Interact mode, buttons and switches will react to touching the screen even when not touching the component location. This is very frustrating causes a lot of problems, especially with buttons that remain depressed when the user can’t tell, which really messes with logical interactions and troubleshooting. I love this app. However, I would really like these issues fixed. If they do I will rate this app at least 4 stars. 5 stars can be achieved if somehow you can make the app perform better with more components. I understand the admitted limitations but even adjusting settings to the highest performance does not help. There is so much default space in the app but it’s not possible to use all of this space considering the app (and desktop application) crashes once too many components are placed. I can’t help but feel like there must be a way to make this app perform better if so much space is made available. Ideally I would like to be able to replicate the 8 bit CPU project tutorial by Ben Eater. This app has all of the components but unfortunately does not have the memory capacity. ### 4/5 — Overall, love this program! *2023-10-12* I use this app a lot and also have this program on desktop. The greatest benefit is that I can build circuits without having to buy components. That in and of itself is the best value about this app. That aside, and understanding that this app acknowledges its shortcomings, I have a list of issues to fix to make this 5-star. 1. Allow simulation pausing. 2. Fix the power rails. They’re backwards. 3. Add hotkeys to the desktop version. 4. Fix the bugs. There are several I can list but don’t have enough space. 5. Add resistance monitoring view. 6. Make it so that push buttons can be placed across rails just like IC chips. 7. Primary bug in the App version is that the rotation is broken. The image of components does not rotate with the UI and it’s hard to tell if components have actually logically rotated. 8. Add in the “Show Pins” view to the app version that exists in the desktop version. There are several bugs, and I can forgive that. So, overall, I love the app and hope to see further improvements. Ideally I would like to be able to replicate the 8 bit CPU tutorial that Ben Eater provides on YouTube. The components are there but the capacity of this app prevents replication. ### 4/5 — Not complete.. Año Single Missing *2023-09-06* The main idea is pretty good. It was very intuitive . But the app is not complete. I can't change the direction from many parts. Like it's transistor. That's not so cool. And some other graphic error ### 4/5 — needs op amp *2023-04-14, version 1.0.3* needs op amp title says all -Z.M.A. ### 4/5 — Very good *2023-04-09* very good, but I expected it to have microcontrollers like the Steam version ### 2/5 — Ned more tools *2023-02-22* Need an ociloscope Signal generator BJT transistors ### 2/5 — Very Clunky Interface *2022-12-13, version 1.0.3* The interface is terrible and components are extremely difficult to place where they are wanted. I purchased this because it has a good cross section of ic components and I am only keeping it because of this and in the hope that the developer will work on the software to improve component placing. In its current state certainly not worth the price and very difficult to use. ### 5/5 — Well made app *2022-08-31, version 1.0.3* The app works very well. Just a bit tedious to make a circuit all on a phone/iPad. Future PC integration would be awesome ## Most critical reviews (10 lowest-rated) ### 1/5 — CRUMB *2026-01-30, version 1.0.3* “Very” limited in the number of devices available. I am not impressed. In fact I want my money back. ### 1/5 — Would improve is you put modern components *2026-01-24, version 1.0.3* Would like to see implementation of Texas Instruments IC or LTC series to. ### 1/5 — Terrible program design *2025-08-09, version 1.0.3* I feel like I’m fighting the program instead of using it!!! ### 1/5 — Doesn't work *2023-10-26, version 1.0.3* It's an amazing idea overall, but as a professional trying to test circuits on the go or without blowing components up accidentally there's no way to make useful circuits that translate to real life. Aside from lacking basic beginner tools like op amps and arduino, the math just doesn't add up. The potential in this app is amazing but if the calculations in the app don't match the ones on my board or notes then it doesn't really work as a tool. Beginners beware... ### 1/5 — Good idea, very poor execution *2023-10-05, version 1.0.3* I think the idea is very good, but implementation is bad. Making it 3d feels unnecessary and actually makes it difficult to place parts. Once on the breadboard, moving them seems impossible. I am repositioning everything but the part I want to move. Ultimately I spent 30 minutes placing like three pieces and eventually gave up. I understand this is an ambitious project, and using the unity engine imposes various constraints. That’s all understandable, but I think this app at least currently is a poor choice for rapid prototyping. I have no idea what other reviewers are doing, but working with basic electronic components and wires to connect things is just difficult and slow. I want a rapid prototyping app and this just isn’t it. It is a shame too, because it seems quite capable. ### 1/5 — IDK *2023-01-05, version 1.0.3* I was able to place a dip switch. I tried to change the selections on it, but not intuitive if there is a way. I tried a refund. No bueno. I guess my only ability to have issue is to leave this unfortunate review. ### 1/5 — Refund *2022-12-03, version 1.0.3* How do I get a refund ### 1/5 — Promising, but doesn’t work and the UI is subpar *2022-09-21, version 1.0.3* No included manual either ### 2/5 — Been crashing a lot recently *2025-09-18, version 1.0.3* I find that the app crashes when using the “corners” option on jumper wires ### 2/5 — Let down *2025-06-10, version 1.0.3* There are limited, single-category logic chips available with no way to expand the availability of different types of chips. This product seems more like a Beta release than a charge to use product. ## Most praised reviews (10 highest-rated) ### 5/5 — Just what I was looking for. *2025-08-18, version 1.0.3* As an absolute beginner hungry for a new hobby and after a lot of searching I think I have found the perfect space to learn a new skill. I love the simplicity of putting things together and seeing how they react. The graphics are great and there are plenty of components to play with. This is a great resource and I’m very grateful to the guy who put it together. ### 5/5 — Fantastic simulator despite a few quirks *2025-01-13, version 1.0.3* I’ve been using this simulator to follow the Ben Eater 8 bit computer series and I absolutely love this app. There’s a few quirks that you may run into but the fixes are rather straightforward at least for the iPad version. I’ve experienced some crashing on Mac which has been frustrating but overall, I’m in love! ### 5/5 — Can you add a 12 segment display? *2024-04-26, version 1.0.3* Seven segment display is fine, but it can’t support letters ### 5/5 — Great App but it was abandoned *2024-04-12, version 1.0.3* Great app but no updates or fixes in over a year ### 5/5 — This app is great! Here is how you can improve it: *2023-08-01, version 1.0.3* 1. I would like to have arduino and other microcontrollers. 1 1/2. I would like to have a spot to code arduino and other microcontrollers. 2. I would like to have it so that you can color the wires a custom color. 3. I would like to be able to create circuit boards with custom and pre-set colors, and put my own electronics on them. 3 1/2. I would like to be able to have pre made circuit boards. 4. I would like to be able to, for example, make a circuit on a bread board, and then press a button and label my circuit, and make that circuit an electronic component. 5. Last but not least, When trying to create a wire using “corner to corner” mode, I would like it if you tapped on any hole on a bread board or power rail, then it would connect to that hole. Thanks for reading my review & please implement everything I said! 👋 ### 5/5 — Amazing App! But… *2023-06-07* Add a way to snap rotations and positions like the Steam version, please. I really can’t stand my circuits with weird rotations/positions. It would be awesome to also have the CD4511 too. Other than these cons mentioned, the app has everything you need to simulate your simple electronics! Amazing!!! ### 5/5 — 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 *2023-03-23, version 1.0.3* I always wanted an app like this so Thank you so much to the developers working on this I know it’s still not finished & still under development but I’m still giving it ⭐️⭐️⭐️⭐️⭐️ because I know it will be amazing 👌🏼 ### 5/5 — An outstandingly good STEM app *2022-11-25, version 1.0.3* I really like this piece of software. It combines breadboarding with education in a really nice and easy-to-use way. I was a little disappointed not to see the Arduino component (I thought it was included after reading about the app on Hackster.io) but I’m hoping that will be added sometime soon. Another possible improvement - but admittedly not a simple one - would be to add a schematic feature, so you could design the circuit before you start breadboarding. I can see that would be a massive addition, so I don’t expect it to happen soon/ever, but it would be nice. But at this price point, I have to say it is an outstandingly good STEM application. ### 5/5 — Very well implemented Simulation Tool *2022-09-17* Everything is pretty intuitive, and with Future Updates adding even more functions and components this will be even more amazing ### 5/5 — I’m learning a lot! *2022-09-03, version 1.0.3* I discovered this app just as I was beginning to learn about electronics, and I’ve learned so much in the past week of using it! The examples have taught me a ton and I’ve learned way more from experimenting with this than I ever did with a real breadboard. There are tools to let you see what the voltage and current are doing and warn you when you make a mistake that would fry something. I’ve given five stars because I think the value I’ve gained far outweighs the cost I paid, but I do hope you keep improving it. The touch controls and UI can be a little flaky at times, and I would love to have more components, like MOSFETs, transformers, relays, AC power supply, and a little music player for learning how to build an amplifier. I’d also like to have many more examples of classic circuits to experiment with. Thanks for building this. It’s fantastic. --- *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 2026-08-25.*