Core Bio vs Illustrate GPT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Core Bio
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Core Bio provides self-tests for biology, with a focus on genetics, in the 9th grade, and 12th grade, and for university Intro to biology classes. Self-tests include subjects to the rules of inheritance of amino acids and macromolecules. The 12th-grade high school level has questions crafted from the GCSE exam for biology. Visual self-tests help users memorize using a flash card mode with self-tests to enter the names of organelles or stages of biological processes.
Illustrate GPT
Explore the inner workings of AI language models with a compact GPT model on your iOS device. Generate stories, visualize predictions, and understand AI's attention mechanisms. Ideal for AI enthusiasts and curious learners.
- Pocket-sized AI model
- Interactive story generation
- Next token prediction exploration
- Attention visualization (Pro)
- Model insights and visualizations
- Customizable generation settings
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How does ChatGPT actually write? Illustrate GPT answers that question with a real language model running entirely on your iPhone. You don't just read about it: you open it up and watch it think. Illustrate GPT runs Baby Llama 2, a tiny GPT trained on children's stories. It has the same architecture as the big models, small enough to run offline in real time. Eight short interactive chapters take you from raw text to the next word, and every chart comes from the live model. THE COURSE 1. Meet Baby GPT. Watch a story being written one token at a time. Each word is colored by how confident the model was. Tap any word to see the alternatives it considered, and pick a different one to rewrite the story from that point. 2. Tokens. Type anything and see how it gets chopped into pieces and turned into numbers. Find out why " cat", "Cat" and " CAT" are different things to a model. 3. Embeddings. Every token is a list of 288 numbers. See a word's vector, find its nearest neighbors (king → queen, prince, crown), and measure how similar two words are. 4. Attention. Tap a word and see which earlier words it looks at. Explore all 36 attention heads. Each one's role (previous-token, duplicate-token, attention sink, and more) is detected automatically. 5. Layers. Use the "logit lens" to watch the prediction take shape block by block, from a vague guess at the bottom to a confident answer at the top. Then browse the full model blueprint with real weight shapes. 6. Sampling. Turn the temperature, top-k and top-p knobs and watch the probabilities change in real time. Roll the dice, and write three different futures from the same sentence. 7. The Loop. Step through the whole pipeline for a single token, from tokenize and embed through 6 transformer blocks to probabilities, sample and append, then do it again. 8. Your Turn. Now you are the model. Guess the most likely next word and see how your intuition compares with a neural network. BUILT FOR LEARNING • Every chapter starts with a "predict first" question, so you form a guess before you see the answer. • Key ideas, common myths vs. reality, and an optional "Go deeper" section in every chapter. • Your progress is saved, so you can learn at your own pace. PRIVATE AND OFFLINE The model runs on your device with Apple's MLX framework. No account, no server, no data leaves your phone. FREE Every feature is free. An optional tip supports development. Perfect for students, teachers, developers, and anyone curious about what's really going on inside AI.
Screenshots
Verdict
The clearest difference is in-app purchases: Core Bio at none against Illustrate GPT's 1. Core Bio also leads on iOS requirement (15.0 vs 17.6). On price, 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
Both are free to download. Illustrate GPT sells 1 one-off in-app purchase. Core Bio asks for nothing beyond the download.
| Parameter | Core Bio | Illustrate GPT |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 75 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Kristopher Hoeksema | 一和 朱 |
In-app purchases
Core Bio
No in-app purchases
Illustrate GPT
- PRO Mode$1.99
Questions
Is Core Bio free?
Is Illustrate GPT free?
Do Core Bio or Illustrate GPT have ads?
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