Vigilance Buddy vs C2 Stroop Task
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vigilance Buddy
This app measures response speed to visual stimuli using a psychomotor vigilance task. Users can customize test parameters and easily collect and email results. Its user-friendly design makes it accessible to individuals with varying levels of tech experience.
- Psychomotor vigilance task (PVT)
- Measures response speed
- Customizable test parameters
- Collect and email results
- User-friendly interface
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Vigilance Buddy by Research Buddies This application is based on the ‘psychomotor vigilance task (PVT)’ which measures the speed of which users respond to the given visual stimulus. Edit the number of rounds per test, maximum time between tap and start of the timer and much more. Collect & Send the results directly to your personal email address. With our focus on usability the application can be used easily by anyone. Because of this it doesn’t matter if your subjects are digital natives or people with zero to none tablet experience. Happy researching!
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: Vigilance Buddy at every 4 months against C2 Stroop Task's every 10 months. Vigilance Buddy also leads on price ($1.99 vs $3.99). C2 Stroop Task's advantage is iOS requirement (15.6 vs 17.0). On ads, in-app purchases 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
Vigilance Buddy costs $1.99 and C2 Stroop Task $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Vigilance Buddy ships an update every 4 months, C2 Stroop Task every 10 months. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.
| Parameter | Vigilance Buddy | C2 Stroop Task |
|---|---|---|
| Price | $1.99 — better | $3.99 |
| Rating | 4.4 (44 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 44 — better | — |
| Update frequency | Every 4 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Byrt | Yasuyoshi Ota |
In-app purchases
Vigilance Buddy
No in-app purchases
C2 Stroop Task
No in-app purchases









