ExtCalc vs Night Eyes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ExtCalc
This scientific calculator offers a colorized text view for formulas, allowing for individual calculation sheets and easy memorization of results. It features a customizable constants pool, VAT calculator, and cloud synchronization for seamless use across devices. Accessibility and team collaboration are also emphasized.
- Colorized formula view
- Individual calculation sheets
- Memorize results
- Customizable constants pool
- VAT calculator
- Cloud synchronization
- Apple Watch app
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ExtCalc is an innovative scientific calculator that makes operating computations easy. It shows your whole formula in a colorised text view. You can have different calculation sheets for different formulas or you just use one sheet for all your formulas. Deletion and memorizing results are integrated as well. Last, but not least, it includes a customizable constants pool and a VAT calculator. All nifty features in a short list: * Individual calculation sheets, with the possibility to print them * Color highlighting * Memorizing results, e.g. via the ANS button and through the calculation sheets, get old values by tapping on them in the sheet * Many functions, even in portrait mode * Grouping (brackets) * Error proof, you can't input formulas that would lead to errors * Constants pool, easily customizable * iCloud support for synchronization between devices * VAT calculator * Apple Watch app * Cloud synchronisation to stay up-to-date on all devices * AR scene * Print calculation sheets * Dark Mode * Strong focus on accessibility * SharePlay to work in a team Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://develicious-studios.de/privacy.html
Night Eyes
Enhance your mobile device's camera for low-light photography. This app uses advanced algorithms to amplify residual light in real-time, allowing you to capture details in dim conditions. It offers various amplification modes, exposure times, and color filters for improved image quality.
- Residual light amplification
- Real-time luminance histogram
- Up to 1-second exposure time
- 10x digital live zoom
- Multiple color filters
- HD photo capture
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Have you ever wanted to take a photo in low light conditions? Due to complex mathematical algorithms Night Eyes provides residual light amplification in real-time for your iPhone, iPad and iPod touch without additional hardware. The image is illuminated in real-time (without delay). You can also switch the light amplification mode to exposure mode for better quality. With an exposure time of up to one second you will be able to view the smallest details. It's ideal for twilight situations. The luminance histogram shows you the brightness level in real-time. Zoom in inconspicuously using the 10x digital Live Zoom - and shoot your photos. You've naturally got many different color filters to choose from. The most important functions are: - Three amplification modes - Up to 1 second * exposure time - Residual light amplification - True low light enhancement - Real-time luminance histogram - Volume Up (+) Photo Capture - 10x digital live zoom - Tap to focus - Color filters: green, red, blue, b/w, sepia, etc. - Take HD photos - Landscape and portrait modes - Supports the front & back cameras - Supports LED lights - Supports EXIF-data *) only on supported devices A good camera and a powerful processor are required, to get the maximum picture quality. All the screenshots listed were taken with an iPhone and iPad and are genuine! Please note that this app does not provide true night vision functionality. The iPhone, iPad and iPod touch have no infrared amplifier, as a result no pictures can be taken in total darkness; a minimal level of light is still required, which can be ascertained by the camera's sensors. The preview will also be delayed in exposure mode. In addition the camera must be held stable for exposure time. ---------------------------- Follow us: http://twitter.com/CLIDOapps Visit us: http://www.clidoapps.com - Subscription Terms: https://www.clidoapps.com/app/iap/ios/nighteyes Privacy Policy: https://www.clidoapps.com/app/privacy/ios/nighteyes Terms and Conditions: https://www.clidoapps.com/app/tac/ios/nighteyes
Screenshots
Verdict
The clearest difference is review sentiment: Night Eyes at 65% against ExtCalc's 0%. Night Eyes also leads on update cadence (every 2 months vs every 5 months). ExtCalc's advantage is ads (none vs shown) and device support (6 vs 2). On price, in-app purchases, monetization model and iOS requirement 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. ExtCalc sells 1 in-app purchase, starting at $4.99 per year and Night Eyes sells 5 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
ExtCalc ships an update every 5 months, Night Eyes every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | ExtCalc | Night Eyes |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.4 (21K ratings) — better |
| Positive reviews | 0.0% of reviews | 64.7% of reviews — better |
| Number of ratings | — | 21K — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — better | iPhone, iPad |
| Requires iOS | 18.7 | 17.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthias Weber | Nico Schroeder |
Customer experience
ExtCalc
Night Eyes
Bugs and requests
ExtCalc
Not enough reviews yet to summarise bugs or requests.
Night Eyes
Reported bugs
3 issues- App crashes when switching between modes
- Zoom and focus features not always reliable
- Compatibility issues with newer iPhone models
Requested features
4 requests- Add video recording capability
- Improve low-light performance without draining battery
- Provide more detailed instructions and tutorials
- Offer a free version without ads
In-app purchases
ExtCalc
- Yearly Subscription$4.991 Year
Night Eyes
- Night Eyes - One Month Premium$1.991 Month
- Night Eyes - One Year Premium3 Days trial$6.991 Year
- Night Eyes - One Week Premium3 Days trial$8.997 Days
- Remove Ads$9.99
- Night Eyes Pro - Lifetime$9.99









