Hands vs C2 Stroop Task
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hands
This app offers an interactive way to learn math concepts like set theory, geometry, and logic. It features 8 levels of difficulty, presenting students with challenges to solve using attribute blocks and logical reasoning. It's designed to improve basic math skills and logical thinking for elementary students.
- Interactive math concept learning
- Set theory, geometry, number theory, logic
- 8 levels of difficulty
- Logical problem-solving challenges
- Venn diagram exercises
- Shape and pattern recognition
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Hands-On Math Attribute Blocks provides an interactive learning environment for learning and enhancing mathematical concepts related to set theory, geometry, number theory, and logical thinking. It is a perfect classroom tool for core mathematics instruction and enrichment. While using this app students will use mathematical thinking skills to solve randomly generated problems. Students will find the challenges solvable through interaction. The skills learned are relevant to the elementary mathematics curriculum. Encourage your students to try Hands-On Math Attribute Blocks, and as they do you will see them get better at many basic math skills. Attribute Blocks offers 8 levels of difficulty. Younger learners will benefit from the settings where the challenge is to place blocks and determine the logical rules for which blocks are accepted and which blocks are rejected. For older students teachers may want to use some of the options where the challenge is to find a missing rule for a pattern or Venn diagram. Targeted Mathematical Development in the Following Areas: Set Theory - Sets, subsets, negations, union, intersection and Venn diagrams Geometry - Names and properties of shapes Number Theory - Sequences and patterns Logic and Reasoning - Solving logical problems using the scientific method, deductive reasoning Levels: Level 1: Shapes and Colors - Getting Familiar with Attribute Blocks Level 2: Classifying Shapes - Recognizing Similar Attributes Level 3: Classifying Shapes using Two Attributes - Recognizing Similarities and Differences Level 4: Logicial Patterns - Recognizing Differences to Develop a Pattern Level 5: 2 x 2 - Logical Problem Solving based on Attributes and Differences Level 6: 3 x 3 - Logical Problem Solving based on Attributes and Differences Level 7: Venn Diagram - Logical Relationships (Two Attributes) Level 8: Venn Diagram - Logical Relationships (Three Attributes)
C2 Stroop Task
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The iOS app "C2 Stroop Task" is intended for those who are interested in cognitive psychology, those who are learning cognitive psychology, and those who are researching it. * The effect of the Stroop task appears as a difference in time to perceive text color in the following two cases, for example. ・text color = red, text = "red" (compatible) ・text color = red, text = "green" (incompatible) This app allows you to see the Stroop effect numerically. The iOS app "C2 Stroop Task" records the response time of a stroop task (task conflict) in milliseconds. Response time is the time from when the task is displayed to when the answer button is touched (touchdown). The recorded data can be output to a CSV file and read into a spreadsheet application such as Excel. Language settings can be made by editing the words for each color, so any language that can be entered from the keyboard can be set. You can set the intertrial interval, number of tasks, compatibility rate, color selection, position, size, background color, whether to shuffle the answer buttons, etc. [details] https://app.brain-workout.org/strooptask-e/
Screenshots
Verdict
The clearest difference is update cadence: C2 Stroop Task at every 10 months against Hands's every 27 months. C2 Stroop Task also leads on device support (3 vs 1). Hands's advantage is price ($2.99 vs $3.99) and iOS requirement (12.0 vs 15.6). On ads and in-app purchases 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
Hands costs $2.99 and C2 Stroop Task $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Hands ships an update every 27 months, C2 Stroop Task every 10 months. The most recent releases landed on June 2, 2026 and September 24, 2026 respectively.
| Parameter | Hands | C2 Stroop Task |
|---|---|---|
| Price | $2.99 — better | $3.99 |
| Rating | 2.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 27 months | Every 10 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 13 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Ventura Educational Systems | Yasuyoshi Ota |
In-app purchases
Hands
No in-app purchases
C2 Stroop Task
No in-app purchases









