Convex Programmer's Calculator vs ntfy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Convex Programmer's Calculator
Convert numbers between hexadecimal, decimal, octal, and binary. Perform byte flips, bit shifts, and calculate two's complement. Features bit indicators and word grouping for improved binary readability.
- Number base conversion
- Two's complement calculation
- Byte flipping for endianness
- Left and right bit shifting
- Binary readability enhancements
- Copy, paste, and clear functionality
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Easily convert between hexadecimal, decimal, octal, and binary. Calculate the two's complement of any number. Flip a number's bytes to switch its endianness. Bit-shift left and right. Bit indicators and word grouping make binary easier to read. Tap the number to copy, paste, and clear. Swipe left or right on the number to backspace.
ntfy
This app allows you to send push notifications to your phone from scripts or other applications using simple HTTP requests. It acts as a client for a free, open-source pub-sub service, enabling you to receive alerts and updates directly on your device.
- Send notifications via REST API
- Subscribe to topics
- Publish messages via HTTP
- Integrates with Bash/PowerShell
- Free and open source client
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Send push notifications to your phone from any Bash or PowerShell script, or from your own app using PUT/POST requests, e.g. via curl on Linux or Invoke-WebRequest. ntfy is a client for https://ntfy.sh, a free and open source HTTP-based pub-sub service. You can subscribe to topics in this app, and then publish messages via a simple HTTP API. Uses: * Notify yourself when a long-running process is done * Ping your phone when a backup has failed * Alerts when someone logs into your server Example: $ curl -d "Your backup is done" ntfy.sh/mytopic Find more examples and usage instructions here: https://ntfy.sh/docs
Screenshots
Verdict
The clearest difference is update cadence: ntfy at fortnightly against Convex Programmer's Calculator's every 8 months. ntfy also leads on ratings volume (452 vs 6) and review sentiment (78% vs 67%). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 4.7 for Convex Programmer's Calculator against 4.8 for ntfy. That said, the two scores are not equally well evidenced: ntfy has 452 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 67% of Convex Programmer's Calculator's written reviews are positive against 78% of ntfy's.
Convex Programmer's Calculator ships an update every 8 months, ntfy fortnightly. The most recent releases landed on September 27, 2026 and October 15, 2026 respectively.
| Parameter | Convex Programmer's Calculator | ntfy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (6 ratings) | 4.8 (452 ratings) — better |
| Positive reviews | 66.7% of reviews | 78.4% of reviews — better |
| Number of ratings | 6 | 452 — better |
| Update frequency | Every 8 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 0 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew Daigle | Philipp Heckel |
Customer experience
Convex Programmer's Calculator
ntfy
Bugs and requests
Convex Programmer's Calculator
Not enough reviews yet to summarise bugs or requests.
ntfy
Reported bugs
3 issues- Notifications not working on iOS
- Broken click URLs in notifications
- Compatibility issues with iOS notification summarizing
Requested features
5 requests- Ability to change notification sounds
- Support for Apple Watch
- Customizable topic names/aliases
- Improved iOS notification handling
- All topics view and read/unread indicators
In-app purchases
Convex Programmer's Calculator
No in-app purchases
ntfy
No in-app purchases
Questions
Is Convex Programmer's Calculator free?
Is ntfy free?
Which has better reviews, Convex Programmer's Calculator or ntfy?
Do Convex Programmer's Calculator or ntfy have ads?
Which is updated more often, Convex Programmer's Calculator or ntfy?
Other comparisons
