Comparison

CRUMB vs ChatLLM

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

Head to head
About

CRUMB

Explore and build electronic circuits in an interactive 3D environment. Learn circuit basics, experiment with components, and analyze performance with built-in tools without the risk of damaging real parts.

Highlights
  • Interactive 3D circuit construction
  • Wide selection of electronic components
  • Study transistors and audio filtering
  • Program EEPROMs
  • Built-in oscilloscope and analysis views
  • Prototype analysis before real-world construction
Features
Read full description

CRUMB offers an easy to use and interactive introduction to electronic circuits Fully realised in 3D, you can construct prototype circuits as you would at the workbench without the risk of terminal component failure or the hassle of ordering individual components CRUMB comes with a great selection of components to allow you to jump straight in to creating prototype circuits With the catalogue available, it is possible to study the workings of transistors & audio filtering, all the way to programming an EEPROM to run a basic program For the beginner, it is possible to learn and understand the basics of interactivity, and for the enthusiast it is possible to analyse and perfect prototypes before constructing real world models Using the built in oscilloscope and analysis views, it is possible to see clearly the interaction between components from within the wires themselves Through community feedback and suggestion, there will be many more components and features added. For a full feature list and development schedule please visit the website http://www.crumbsim.com

About

ChatLLM

This app integrates multiple advanced AI models for text, voice, image, and video generation. It offers an autonomous AI agent for complex task automation and real-time meeting transcription with AI insights. Personalization options and deep research capabilities are also included.

Highlights
  • Autonomous AI Agent for task completion
  • Real-time meeting transcription and summaries
  • Multi-modal AI chat (text, voice, image, video)
  • Deep web research with source citations
  • Code execution and debugging
  • Document analysis and summarization
  • Personalization with custom instructions and memory
Features
Read full description

ChatLLM – The Most Powerful AI Assistant on Mobile Chat, Create, Listen & Automate with State-of-the-Art AI ChatLLM brings together the world's best AI models — GPT-6.1, Fable 5.1, Opus 5.5, Gemini, DeepSeek, and more — into one app. Chat naturally, generate images and videos, transcribe meetings live, or let the AI Agent autonomously handle complex tasks for you. AGENT — AUTONOMOUS AI AGENT Give the Agent a task and watch it work. It uses multiple AI models, browses the web, writes code, and connects to your tools to complete complex multi-step tasks autonomously. • Research, analyze, and compile reports • Build and deploy websites and apps • Connect to Gmail, Google Drive, Jira, Slack, and more • Track progress with real-time task updates AI LISTENER — REAL-TIME MEETING INTELLIGENCE Record any conversation and get live AI-powered transcription and insights. • Real-time transcription in 100+ languages • AI-generated suggestions while you listen • Automatic session summaries • Custom analysis templates (Key Points, Technical Analysis, or your own) • Chat with AI about any past session • Background recording — switch apps without losing audio ADVANCED AI CHAT Natural, human-like conversations powered by 15+ language models. Ask questions, brainstorm, debug code, or tackle any topic. VOICE CHAT Full voice conversations with AI. Choose from multiple voices, switch between automatic and manual recording modes, and go hands-free. IMAGE & VIDEO GENERATION Turn text into visuals with Nano Banana Pro, FLUX, GPT Image 2.5, Seedream 5, Ideogram, Recraft, and more. Generate videos with Seedance 2.5, Veo 3.1, Kling AI, and Sora 2. DEEP RESEARCH AI-powered web research with source citations. Get comprehensive, multi-source answers to complex questions with real-time activity tracking. CODE EXECUTION Run code directly in chat. Debug, generate snippets, and test ideas with a built-in terminal and playground. DOCUMENT ANALYSIS Upload files for instant summaries, Q&A, and analysis. Supports PDFs, images with OCR, and more. PERSONALIZATION • Custom instructions for tailored responses • Memory system that learns your preferences • Projects to organize conversations and files • Thinking mode for complex reasoning 15+ AI MODELS IN ONE APP GPT-6.1 · Claude Fable 5.1 · Claude Opus 5.5 · Gemini · DeepSeek · Kimi · Grok · Qwen · Perplexity · and more Why Choose ChatLLM? • All the best AI models, one subscription • Multi-modal: Text, Voice, Images, Video, Documents • AI Agent for autonomous task completion • AI Listener for meeting intelligence • SOC-2 and HIPAA compliant — your data stays private This app requires a subscription. Plans start at $9.99/month. Terms of service & privacy policy: https://abacus.ai/terms https://abacus.ai/privacy

Screenshots

CRUMB4 screens
ChatLLM4 screens

Verdict

The call

The clearest difference is price: ChatLLM at Free against CRUMB's $7.99. ChatLLM also leads on rating (4.9 vs 4.4) and ratings volume (3.9K vs 146). CRUMB's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.0). On update cadence, ads 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

ChatLLM is free to download; CRUMB costs $7.99 up front. ChatLLM sells 3 in-app purchases, starting at $9.99 per month. CRUMB asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ChatLLM holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: ChatLLM has 3.9K ratings behind it against 146, so its average is the more settled of the two. Written reviews point the same way: 56% of CRUMB's written reviews are positive against 64% of ChatLLM's.

UpkeepUpdate frequency

CRUMB ships an update weekly, ChatLLM every 4 days. The most recent releases landed on November 12, 2026 and November 8, 2026 respectively.

Scorecard7 real differences · 3 level
CRUMB versus ChatLLM: the parameters behind the verdict, then further details
ParameterCRUMBChatLLM
Price$7.99Free — better
Rating4.4 (146 ratings)4.9 (3.9K ratings) — better
Positive reviews55.6% of reviews64.3% of reviews — better
Number of ratings1463.9K — better
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size496 MB125 MB
Age rating4+12+
DeveloperVital Group LimitedAbacus.AI

Customer experience

CRUMB

All ratings146 ratings
Positive84.9%
Neutral2.7%
Negative12.3%
Written reviews36 reviews
Positive55.6%
Neutral0.0%
Negative44.4%

ChatLLM

All ratings3,864 ratings
Positive96.9%
Neutral1.4%
Negative1.7%
Written reviews319 reviews
Positive64.3%
Neutral8.2%
Negative27.6%

User reviews

CRUMB

From 146 App Store ratings

What we love

  • 👍 Great for beginners
  • 💡 Good for learning new skills
  • ✨ Simple to put things together
  • 🎨 Great graphics
  • 🧩 Plenty of components

Room to improve

  • ❌ Very limited components
  • ❌ Lacks modern components
  • 🐛 Crashing frequently
  • 🐛 App crashes when using corners
  • 🐛 Crashing on Mac

ChatLLM

From 3.9K App Store ratings

What we love

  • 💰 Cheap and powerful
  • 🔥 Amazing best on the market by far
  • 🔥 Abacus ai - Absolutely fabulous tool great work horse, The best value on the market
  • 🔥 The best of AI capabilities into a single, seamless platform!
  • 🔥 Super impressive app

Room to improve

  • 🚫 No account creation
  • 📏 Can't adjust font size
  • 🚫 Doesn't show routing. Doesn't transcribe audio
  • 🐛 Voice chat is not transcribing. I need it. Sometimes I can reenter the thread and it will be there, and then vanish!
  • 🚫 Function but ugly and missing clean ui/ux design

Bugs and requests

CRUMB

Reported bugs

11 issues
  • App crashes when using the “corners” option on jumper wires
  • Experienced some crashing on Mac
  • Component images do not rotate
  • Power rails are backwards related to real life breadboards
  • Program counters (74HC161) do not reset to 0 on a reset signal
Show 6 more
  • 74HC245 enable pin should be labeled active low but it’s not
  • EEPROM sometimes corrupts the data saved in the HEX editor
  • Many components, most commonly the transistor, lock their image in place even if deleted
  • Buttons and switches will react to touching the screen even when not touching the component location
  • Rotation is broken on the app version
  • UI can be a little flaky at times

Requested features

31 requests
  • Implement modern components (TI IC, LTC series)
  • Add 12 segment display
  • Add Arduino and other microcontrollers
  • Add a spot to code Arduino/microcontrollers
  • Allow custom wire colors
Show 26 more
  • Create circuit boards with custom colors
  • Add pre-made circuit boards
  • Ability to create custom electronic components from circuits
  • Improve corner-to-corner wire mode for breadboard/power rail connection
  • Add snap rotations and positions
  • Add CD4511 component
  • Add oscilloscope
  • Add signal generator
  • Add BJT transistors
  • Add op amp
  • Add MOSFETs
  • Add transformers
  • Add relays
  • Add AC power supply
  • Add music player for amplifier learning
  • Add more examples of classic circuits
  • Simulation pausing
  • Add hotkeys to desktop version
  • Add resistance monitoring view
  • Allow push buttons to be placed across rails
  • Add 'Show Pins' view to app version
  • Add schematic feature
  • Add manual
  • Add more functions and components
  • Add more examples
  • PC integration

ChatLLM

Reported bugs

5 issues
  • Voice chat is not transcribing
  • Chats disappearing after re-entering the thread
  • App freezing or becoming laggy when generating responses on mobile
  • Voice chat not working
  • App crashing on mobile

Requested features

11 requests
  • Add transcript to the headphone mode
  • Rename a thread
  • Add execution time and other metrics for each request
  • Indicate which LLM served the request when using routeLLM
  • Add an iPad version
Show 6 more
  • Add ability to delete chats on mobile
  • Add voice chat and talk back feature
  • Improve copy/paste functionality
  • Allow selecting text
  • Add ability to set default LLM
  • Improve font size customization

In-app purchases

None

CRUMB

No in-app purchases

3 purchases

ChatLLM

Subscriptions3
  • Monthly Subscription$9.991 Month
  • Monthly subscription$9.991 Month
  • Pro Tier$19.991 Month

Questions

Is CRUMB free?
CRUMB costs $7.99, with no in-app purchases.
Is ChatLLM free?
ChatLLM is free to download, with in-app purchases available.
Which has better reviews, CRUMB or ChatLLM?
ChatLLM is rated higher. CRUMB averages 4.4 out of 5 from 146 ratings, while ChatLLM averages 4.9 from 3.9K ratings.
Do CRUMB or ChatLLM have ads?
Neither CRUMB nor ChatLLM shows ads.
Which is updated more often, CRUMB or ChatLLM?
CRUMB ships an update weekly, and ChatLLM every 4 days. Most recently, CRUMB was updated on November 12, 2026 and ChatLLM on November 8, 2026.

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