Four Seconds vs EchoVis Quiz
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Four Seconds
Test your timing by stopping a timer at precisely four seconds. Compete with others on the leaderboard to see who has the best precision. It's a simple yet challenging game of skill.
- Precise timer stopping
- Four-second challenge
- Global leaderboard
- Simple gameplay
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Can you hit the bullseye? ---- A timer and a simple rule: stop it at exactly four seconds. Let's see how well this goes. See you on the leaderboard!
EchoVis Quiz
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Welcome to the EchoVis Quiz game. We hope that it will help you improve your hearing sensitivity – and its effectiveness. It will increase your skills in the field of recognizing sound propagation in various environments, its reflections, distortions, and the knowledge of the echolocation phenomenon. The main objectives of the game are: • Improving the ability to use the hearing organ, • Learning the skill of using echolocation, • Providing entertainment through competing with other players – ranking. The game essentially targets anyone without a significant hearing dysfunction. You can play it with, and compete against your family members, friends or yourself. Its educational aspect is also vital in the case of the blind and visually impaired. The game makes it possible to get accustomed to sounds in different spaces: at home, in the forest, between buildings, on busy streets, inside such structures as train stations, etc. All the above can be achieved in the safe and peaceful surroundings of your home. You do not have to go anywhere. We will “teleport” you to many interesting places. All you need are your headphones, a smartphone, and our app. Each of the questions and the suggested answers relate to a sound recording. Questions are illustrated using various audio recordings: classic stereo, binaural recordings and other. This is why we strongly recommend using proper headphones that enable receiving stereo-quality sound. In the light of the above, correctly putting the headphone on the proper ear – right and left – will be crucial. More advanced users can also use adequately spaced speaker sets for this purpose. Some of the recordings were made in a specially prepared space using reflective or sound-attenuating walls and clickers that emit waves of various frequencies. They enable testing yourself under highly demanding acoustic conditions and learning to focus on very specific aspects of various sound phenomena. The game contains packages comprising 50 recordings. The number 0 package is free of charge. You will have to pay a small amount for each subsequent one. The first edition contains packages 0 and 1. We plan to deliver successive ones in the future. We wish you productive learning and high-ranking records.
Screenshots
Verdict
The clearest difference is in-app purchases: Four Seconds at none against EchoVis Quiz's 6. Four Seconds also leads on iOS requirement (10.0 vs 13.0). EchoVis Quiz's advantage is update cadence (every 6 months vs every 22 months). On price, ads 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
Both are free to download. EchoVis Quiz sells 6 one-off in-app purchases. Four Seconds asks for nothing beyond the download.
Four Seconds ships an update every 22 months, EchoVis Quiz every 6 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Four Seconds | EchoVis Quiz |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 22 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 24 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrei Antonescu | Transition Technologies S.A. |
In-app purchases
Four Seconds
No in-app purchases
EchoVis Quiz
- Package 1$1.99
- Package 2$1.99
- Package 3$1.99
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- Package 4$1.99
- Package 6$1.99
- Package 5$1.99









