HelloAndBye vs Math keyboard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HelloAndBye
Read full descriptionHide full description
Tired of cluttered contact lists? Our app allows you to save contacts with a timer, ensuring they automatically delete after a set period. Ideal for temporary contacts such as vacation rentals, short-term work projects, or one-time connections. Keep your contact list neat and efficient!
Math keyboard
Perform calculations directly from your keyboard without switching apps. This smart helper allows quick math while chatting, taking notes, or entering data. It features calculator memory to save and reuse values, enhancing productivity.
- Built-in calculator keyboard
- Calculator memory function
- No app switching required
- Supports basic and advanced operations
- Minimalist design for productivity
Read full descriptionHide full description
A Custom Keyboard with a Built-In Calculator — Do the Math Without Switching Apps This smart calculator app is built into your keyboard, so you can perform quick calculations while typing in any app. Whether you're chatting, taking notes, or entering data, this math helper is always ready. Designed as a lightweight, efficient custom keyboard, it functions as a full math keyboard, now with calculator memory to store and reuse values easily. Key Features: - Built-in calculator available directly from the keyboard - Calculator memory for saving and recalling results - No app switching — works in Messages, WhatsApp, Telegram, and more - Supports basic and advanced operations - Clean, minimal design focused on productivity - Perfect for quick math, planning expenses, or typing smarter. Download now and keep your numbers at your fingertips.
Screenshots
Verdict
The clearest difference is price: HelloAndBye at Free against Math keyboard's $0.99. Math keyboard's advantage is update cadence (monthly vs every 3 months). On ads, in-app purchases, device support 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
HelloAndBye is free to download; Math keyboard costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HelloAndBye ships an update every 3 months, Math keyboard monthly. The most recent releases landed on September 9, 2026 and October 3, 2026 respectively.
| Parameter | HelloAndBye | Math keyboard |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Mauro Bianchelli | Nikolai Rodionov |
In-app purchases
HelloAndBye
No in-app purchases
Math keyboard
No in-app purchases
Questions
Is HelloAndBye free?
Is Math keyboard free?
Do HelloAndBye or Math keyboard have ads?
Which is updated more often, HelloAndBye or Math keyboard?
Other comparisons
