WhenDo vs SyntBlaze
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
WhenDo
This tool provides a graphical programming environment for learning Arduino. It simplifies coding by allowing users to drag and combine blocks to create programs. The app supports wireless downloads to compatible Arduino devices and utilizes a cloud server for compilation.
- Graphical programming with drag-and-drop blocks
- Clear logic structure (When, Centre Node, Do blocks)
- Cloud server compilation
- Wireless BLE downloads
- Compatible with Bluetooth 4.0 Arduino chips
Read full descriptionHide full description
This is the most comprehensive graphical programming and developing tool based on Arduino. WhenDo is the most sufficient way to learn about Arduino and every basic programming logic. WhenDo is compatible with all the Arduino chips that have Bluetooth 4.0 module . Significant Features: 1. Graphical programming In this graphical programming language, user just need to drag condition and execute blocks and freely combine them. This development tool applies many amusing functions that the Arduino can accomplish in WhenDo. 2. Clear and meticulous logic Each sentence involves three elements: When block ( condition setting), Centre Node (combine When & Do block) and Do block ( execute setting ). Besides, the whole interactive User Interference environment is a big loop, which repeatedly run the program statements. 3. Cloud server compile Excellent file transfer and compile based on a Ubuntu server. Remote access to various libraries to improve its capability. 4. BLE download Wireless download the program through blueTooth 4.0 Arduino devices.
SyntBlaze
Read full descriptionHide full description
SyntBlaze is an app for mastering programming languages and preventing coding skills atrophy. It incorporates learning methodology called Deep Grasping. Rather than passively reading or watching, you do bite-sized exercises, which help you develop core language skills. We focus on software developers who want to write effortlessly, understand deeply and eliminate coding struggles. You might notice that despite broad experience your coding skills are not proportional to your level. And you might notice that working with AI makes your skills weaker. High language proficiency facilitates the absorption of technical documentation, writing capabilities and high awareness of code behavior. Syntblaze is here to help you with that! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: WhenDo at none against SyntBlaze's 2. WhenDo also leads on iOS requirement (8.1 vs 15.6). SyntBlaze's advantage is update cadence (weekly vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. SyntBlaze sells 2 in-app purchases, starting at $19.99 per month. WhenDo asks for nothing beyond the download.
WhenDo ships an update monthly, SyntBlaze weekly. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.
| Parameter | WhenDo | SyntBlaze |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | โ |
| Update frequency | Monthly | Weekly โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Monetization | Free | โ |
| Devices | iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 8.1 โ better | 15.6 |
| Further details โ not scored | ||
| Size | 22 MB | 100 MB |
| Age rating | 4+ | 12+ |
| Developer | Shanghai Zhiwei Robotics Co Ltd | SyntBlaze LLC |
In-app purchases
WhenDo
No in-app purchases
SyntBlaze
- Pro Monthly3 Days trial$19.991 Month
- Pro Yearly3 Days trial$119.001 Year









