# Periodic Table Question Bank vs Quantum Bob

The clearest difference is price: Quantum Bob at Free against Periodic Table Question Bank's $0.99. Quantum Bob also leads on update cadence (every 2 days vs every 36 months). Periodic Table Question Bank's advantage is iOS requirement (18.2 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

Quantum Bob is free to download; Periodic Table Question Bank costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Periodic Table Question Bank ships an update every 36 months, Quantum Bob every 2 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Periodic Table Question Bank | Quantum Bob |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/quantum-bob/id6759178420/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 2 MB | 13 MB |
| Requires iOS | **18.2** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Prachi Pimpalkhare](https://appshunter.io/developer/359099311) | [SquatchCraft LLC](https://appshunter.io/developer/1440325922) |

## What reviewers say

### Periodic Table Question Bank

[App page](https://appshunter.io/ios/app/periodic-table-question-bank/id434044942)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Quantum Bob

[App page](https://appshunter.io/ios/app/quantum-bob/id6759178420)

Engage with real quantum physics experiments by predicting measurement outcomes from actual quantum computer data. Compete against an AI leveraging quantum entanglement and discover the quantum advantage through interactive gameplay and lessons.

**Highlights:** Real quantum measurement data, Compete against quantum AI, Local multiplayer, Interactive lessons, Progress tracking, Statistical proof tests

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Periodic Table Question Bank free?

Periodic Table Question Bank costs $0.99, with no in-app purchases.

### Is Quantum Bob free?

Quantum Bob is free to download, with no in-app purchases.

### Do Periodic Table Question Bank or Quantum Bob have ads?

Neither Periodic Table Question Bank nor Quantum Bob shows ads.

### Which is updated more often, Periodic Table Question Bank or Quantum Bob?

Periodic Table Question Bank ships an update every 36 months, and Quantum Bob every 2 days. Most recently, Periodic Table Question Bank was updated on October 27, 2026 and Quantum Bob on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*