Quantum Quack vs WhosNext
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quantum Quack
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- What is this App? Quantum Quack makes a decision from a list of options you provide, using quantum random numbers, which are fundamentally different than ordinary random numbers. Making a decision based on quantum randomness has fascinating implications that vary depending on the various interpretations of quantum mechanics. The two main ones are detailed here, within the hypothetical and highly relevant example of choosing between an Italian and a Chinese restaurant. - In the Copenhagen Interpretation: This is historically the first dominant interpretation, and is therefore still presented as the standard one in most textbooks. In this interpretation, a quantum measurement "collapses" the quantum state onto one of its possible outcomes. The collapse is fundamentally random, as opposed to ordinary random processes. Indeed, the result of a dice roll for example, appears random to us only because it is a complex process to predict. However, it is in principle perfectly predictable, knowing the laws of mechanics and all the dice’s properties. The randomness here is emergent, not fundamental. All randomness at human scale is of this sort, and in principle every human-scale phenomena are determined in advance, even you reading this text right now! Making a quantum choice then breaks this deterministic chain of events. In other words, if some supernatural intelligence knew everything about the universe at the moment of your birth, it could predict everything about your future life, except if you’re going to that Italian or Chinese restaurant. In summary: you escape determinism. - In the Many-Worlds Interpretation: This is a popular interpretation among researchers working on the foundations of physics. In this interpretation, during a quantum process, the state of the universe splits into all possible outputs of the process, called "branches", each of which behaves as an independent universe. We then have two branches, one in which you go to the Italian restaurant, and one in which you go to the Chinese restaurant. Both exist simultaneously in the abstract state space of the universe. If the result turns out to be the Italian restaurant, you can take confort in the idea that, somewhere, you are also enjoying the Chinese restaurant. Lucky you! In summary: you end up doing all the options at once. - How does it work? Mobile phones contain an element that can measure quantum processes: the camera! The detection of light by a pixel is subject to quantum fluctuations (known as shot noise), and constitutes a quantum measurement as discussed above. When you tap "Quack it", the app takes a picture and uses these fluctuations to produce a random number, which is then used to pick one of your options with equal probabilities. Shortcuts are available for common entries, such as yes/no, directions (for quantum exploring), or digits.
WhosNext
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Can't decide? Let randomness choose for you! WhosNext is the ultimate decision-making toolkit. DECISION TOOLS: - Finger Chooser — Place fingers on screen, one gets randomly picked - Lucky Wheel — Add your own options, spin to decide - Coin Flip — Heads or tails with live statistics - Number Generator — Random numbers with frequency charts - Dice Roller — 3D animation for up to 6 dice - Team Generator — Split players into random teams - Bottle Spinner — Spin the bottle digitally - Magic 8-Ball — Ask a question, shake for answers MINI GAMES: - Memory — Find pairs (3 difficulty levels) - Tic-Tac-Toe — Classic strategy game for 2 players - Rock Paper Scissors — Play vs AI with stats - Blackjack — Classic card game - Roulette — Spin the casino wheel - FIFA Team Picker — Random teams for FIFA nights NEW FEATURES: - Dark Mode / Light Mode - Achievement Badges - Detailed Statistics - Works completely offline (No tracking)
Screenshots
Verdict
The clearest difference is update cadence: Quantum Quack at every 2 days against WhosNext's every 6 months. WhosNext's advantage is iOS requirement (13 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Quantum Quack ships an update every 2 days, WhosNext every 6 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | Quantum Quack | WhosNext |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 days — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13 — better |
| Further details — not scored | ||
| Size | 1 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Morgan Facchin | SALAH ALDIN ALHAJI |
In-app purchases
Quantum Quack
No in-app purchases
WhosNext
No in-app purchases









