VisuStruct vs OnDevice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VisuStruct
Visually create algorithms using drag-and-drop structured diagrams. Watch your logic execute step-by-step with an integrated simulator, then automatically generate code. This tool focuses on programming logic before syntax, ideal for learning.
- Visual algorithm creation with drag-and-drop
- Nassi-Shneiderman diagram support
- Automatic code generation
- Step-by-step algorithm simulation
- Focus on logic before syntax
- Clean, distraction-free interface
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Think in Structures. Understand Algorithms. Write Better Code. VisuStruct makes programming logic visible. Design algorithms visually using Nassi-Shneiderman diagrams, run them step by step with the built-in simulator, and turn your structures into real code — without getting lost in syntax. Whether you are learning programming, teaching computer science, or explaining algorithms, VisuStruct helps you focus on what really matters: understanding how a program works. Visualize. Simulate. Understand. Program. Why VisuStruct? • Build algorithms visually with an intuitive editor • Create Nassi-Shneiderman diagrams quickly and clearly • Execute algorithms step by step — like a visual debugger • See exactly how your algorithm flows • Generate code automatically • Learn programming logic before worrying about syntax • Perfect for students, teachers, and programming beginners From your first algorithm to more complex control structures, VisuStruct bridges the gap between **thinking about a solution and writing code**. Stop guessing what your program does. See it.
OnDevice
This app provides a local AI workbench for your iPhone, running open-source language and vision models entirely on-device. Features include live camera captioning, hands-free voice conversation, and code assistance with various models. It prioritizes privacy with no servers, API keys, or telemetry.
- On-device LLM and VLM execution
- Live camera captioning
- Hands-free voice conversation
- Code assistant with multiple models
- Document scanner and live OCR
- Model benchmarking and A/B comparison
- Mac pairing for inference server
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OnDevice is a local-first AI studio for iPhone. Run compatible language, vision, speech, and image models on your device. Browse models and choose what to download. Model size, memory use, and speed depend on your hardware. CHAT AND CREATE Ask questions, write, work with code, save snippets, and export conversations. Use camera or photo input with a compatible vision model, or use built-in OCR without downloading a vision model. Voice conversations use local Apple speech by default, with optional downloadable neural voices. Compatible image models support local image generation, which can be restricted with a parental PIN. YOU CHOOSE THE CONNECTIONS Local inference uses installed models. Network features are optional: model discovery and downloads, web search, paired Mac tools, a local API, and iCloud sync. Web providers may receive the queries or content you choose to send and may require their own API account. No app account is required for local use; there is no analytics SDK. REQUIREMENTS Requires iOS 18 or later. Downloadable models need storage and sufficient available memory. The app may pause or refuse heavy workloads when the device is too hot or memory is low. Model compatibility and performance vary by device.
Screenshots
Verdict
VisuStruct and OnDevice are too close to call on the numbers: across 7 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
VisuStruct ships an update every 4 days, OnDevice every 3 days. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.
| Parameter | VisuStruct | OnDevice |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 194 MB |
| Age rating | 4+ | 17+ |
| Developer | Holger Sebastiao | MESUT CAN YAGCI |
Customer experience
VisuStruct
OnDevice
In-app purchases
VisuStruct
No in-app purchases
OnDevice
No in-app purchases








