Image Superposition vs bOTP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Image Superposition
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A small utility for comparing two images. It works very simply: the user loads two images into the app, selects the same points on each of them (3 is enough, with a larger number the result is averaged) and the app calculates a transformation when the selected points on the first and second pictures would coincide. You can upload images from the clipboard, from the documents of this application, from the photo album, or take a new photo on the camera. All calculations are performed on the device and you don't need internet connection for working with this app. Initially, the program was developed for comparing the coins images, but there is no any technical limitation and it is possible to compare any pictures
bOTP
This utility generates one-time passwords for secure authentication. It supports multiple profiles and stores secrets securely on the device's keychain, making them inaccessible after setup. Passwords can be easily copied to the clipboard for quick use.
- Easy to use interface
- Multiple profile support
- Secure secret storage on keychain
- Secrets are hidden and inaccessible
- One-time passwords copied to clipboard
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An easy to use implementation of Mobile One Time Passwords (Mobile-OTP) see http://motp.sourceforge.net Features: * easy to use * multiple profiles/secrets * arc4random based secret generator * secrets are stored on a keychain * secrets are hidden (once stored, there is no supported way to read them) * one time passwords are copied to the clipboard
Screenshots
Verdict
The clearest difference is in-app purchases: bOTP at none against Image Superposition's 1. Image Superposition's advantage is update cadence (every 12 months vs every 29 months) and iOS requirement (10.0 vs 13.4). 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. Image Superposition sells 1 one-off in-app purchase. bOTP asks for nothing beyond the download.
Image Superposition ships an update every 12 months, bOTP every 29 months. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.
| Parameter | Image Superposition | bOTP |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 12 months — better | Every 29 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 19 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Kazansky | Alexander Hausner |
In-app purchases
Image Superposition
- Buy a coffee for the developer$0.99
bOTP
No in-app purchases
