Comparison

WhenDo vs SyntBlaze

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

Head to head
About

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.

Highlights
  • 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
Features
Read 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.

About

SyntBlaze

Features
Read 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

SyntBlaze4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. SyntBlaze sells 2 in-app purchases, starting at $19.99 per month. WhenDo asks for nothing beyond the download.

UpkeepUpdate frequency

WhenDo ships an update monthly, SyntBlaze weekly. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

Scorecard4 real differences ยท 4 level
WhenDo versus SyntBlaze: the parameters behind the verdict, then further details
ParameterWhenDoSyntBlaze
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyMonthlyWeekly โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
DevicesiPadiPhone, iPad, iPod โ€” better
Requires iOS8.1 โ€” better15.6
Further details โ€” not scored
Size22 MB100 MB
Age rating4+12+
DeveloperShanghai Zhiwei Robotics Co LtdSyntBlaze LLC

In-app purchases

None

WhenDo

No in-app purchases

2 purchases

SyntBlaze

Subscriptions2
  • Pro Monthly3 Days trial$19.991 Month
  • Pro Yearly3 Days trial$119.001 Year

Questions

Is WhenDo free?
WhenDo is free to download, with no in-app purchases.
Is SyntBlaze free?
SyntBlaze is free to download, with in-app purchases available.
Do WhenDo or SyntBlaze have ads?
Neither WhenDo nor SyntBlaze shows ads.
Which is updated more often, WhenDo or SyntBlaze?
WhenDo ships an update monthly, and SyntBlaze weekly. Most recently, WhenDo was updated on October 2, 2026 and SyntBlaze on October 10, 2026.

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