# Paradoxes vs 555 Timer & Oscillators Pro

The clearest difference is update cadence: 555 Timer & Oscillators Pro at every 2 months against Paradoxes's every 90 months. Paradoxes's advantage is price ($0.99 vs $4.99) and chart position (#191 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Paradoxes costs $0.99 and 555 Timer & Oscillators Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Paradoxes ships an update every 90 months, 555 Timer & Oscillators Pro every 2 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Paradoxes | 555 Timer & Oscillators Pro |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/paradoxes/id1231246308/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 90 months | **Every 2 months** |
| Monetization | Paid | — |
| Best chart rank | **#191** | — |
| Size | 28 MB | 22 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 9+ | 4+ |
| Developer | [Polemics Applications LLC](https://appshunter.io/developer/482504032) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Paradoxes

[App page](https://appshunter.io/ios/app/paradoxes/id1231246308)

**Currently charting:** #191 Top Paid · Education (US App Store)

Explore a vast collection of over 220 logical oddities with detailed explanations. This app serves as a reference for philosophy students and anyone seeking engaging conversational topics, offering content in flashcard, dictionary, audio, and self-study formats.

**Highlights:** Over 220 paradoxes with explanations, Flashcard format, Dictionary format, Audio explanations, Self-study mode, Categorized paradoxes

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

**In-app purchases:** none


### 555 Timer & Oscillators Pro

[App page](https://appshunter.io/ios/app/555-timer-and-oscillators-pro/id6504415162)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Paradoxes free?

Paradoxes costs $0.99, with no in-app purchases.

### Is 555 Timer & Oscillators Pro free?

555 Timer & Oscillators Pro costs $4.99, with no in-app purchases.

### Do Paradoxes or 555 Timer & Oscillators Pro have ads?

Neither Paradoxes nor 555 Timer & Oscillators Pro shows ads.

### Which is updated more often, Paradoxes or 555 Timer & Oscillators Pro?

Paradoxes ships an update every 90 months, and 555 Timer & Oscillators Pro every 2 months. Most recently, Paradoxes was updated on October 23, 2026 and 555 Timer & Oscillators Pro on October 25, 2026.

---

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