01Converter vs Contradict
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
01Converter
This app allows for easy conversion between binary, hexadecimal, octal, and decimal number systems. It also includes functions for bitwise operations like shifting and arithmetic operations such as adding or subtracting one. An optimized keyboard simplifies input for various number bases.
- Number system conversion (binary, hex, octal, decimal)
- Unicode conversion
- Shift left function
- Shift right function
- Add 1 function
- Subtract 1 function
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Convert number in binary, hexadecimal, octal, decimal and unicode! Shift left, shift right, add 1 and subtract 1 functions. Simple and straightforward. Optimized keyboard for writing binary, octal, decimal and hexadecimal.
Contradict
This app encourages users to challenge their own perspectives by presenting opposing viewpoints. It provides links to external resources for deeper exploration of topics, fostering open-mindedness and critical thinking.
- Presents opposing viewpoints
- Encourages critical thinking
- Provides Wikipedia links
- Fosters open-mindedness
- Facilitates deeper exploration
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Why would you want an app that disagrees with you all the time? Good question. Being disagreed with is definitely not a pleasant feeling. But I firmly believe that challenging our own views is a great way to keep our minds open and get closer to the truth. With that in mind, the Contradict app is designed to make disagreement as good as possible. For example, all contradictions will have Wikipedia links, so you can dive into a topic with just a tap.
Screenshots
Verdict
The clearest difference is rating: 01Converter at 4.5 against Contradict's 1.0. 01Converter also leads on iOS requirement (8.1 vs 13.0). On price, ratings volume, update cadence and ads 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.
01Converter holds the better App Store score, 4.5 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
01Converter ships an update every 9 months, Contradict every 6 months. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.
| Parameter | 01Converter | Contradict |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 94.4% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 9 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 8.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 11 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Francesco Burelli | Robin Hedinger |
In-app purchases
01Converter
No in-app purchases
Contradict
No in-app purchases
