Jumbo Calculator vs DayCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jumbo Calculator
This app offers a straightforward large-button calculator experience, ideal for quick calculations. It includes intuitive gestures for editing and accessibility features like VoiceOver support.
- Large, easy-to-read buttons
- Swipe for backspace
- Double tap to copy/paste
- Landscape mode calculator
- VoiceOver support
Read full descriptionHide full description
Jumbo Calculator is the super simple large-buttoned calculator for everyone. While you can't feel the exquisite texture of its large plastic buttons (and the included solar panel doesn't actually charge your battery), Jumbo Calculator succeeds at its main purposes: adding, subtracting, multiplying, and dividing. Features: · Easy to read and find buttons (you might be able to touch type on a touchscreen). · Simple gestures for backspace (swipe the calculator screen) and copy & paste (double tap). · A smaller version of the calculator in landscape for when you're too tired to stretch your fingers. · VoiceOver support for blind and low-vision users.
DayCalc
This app combines a powerful calculator with a comprehensive unit converter. It offers standard, scientific, and fraction calculations, along with over 600 units across 20 categories. Users can customize units, add notes to calculations, and enjoy a visually appealing interface with multiple themes.
- Standard, scientific, and fraction calculator
- Live voice calculator
- Add notes to calculations
- Over 600 units in 20 categories
- Custom unit creation
- Automatic currency exchange rate updates
- 50+ themes and dark mode support
Read full descriptionHide full description
DayCalc is an easy to use, beautifully packaged calculator and Unit Converter, includes standard, scientific and fractions calculator, best calculator for your iPad, iPhone and Apple Watch! Calculator: - Live voice calculator - Add notes to history of your calculations, and you can share - Choose between a basic calculator or scientific calculator with more than 30 scientific operations - Use both calculators in portrait or landscape mode (both iPhone and iPad), and split screen support for iPad - Auto adjust height of the history list, no matter how long the calculation process can be displayed in full - Allows locking of calculation history, cannot be deleted and modified after locking - Full watchOS 4 and later support - Support iOS 9 and later spotlight search - Support Dark Mode Unit Converter: - Over 600+ units in 20 categories. - Allows you to add your own unit data, make your own unit converter that meets all your requirements. - Support more than 150 kinds of currency, conversion exchange rate automatic updates - The simplest way to create and use favorite lists. - Add the constant value of your frequently used, it can easily and quickly reused. - Flexible search feature that lets you quickly find what you want the unit and automatically saves your search history. Basic functions: - 50+ beautiful themes for you to choose - View and edit a history of your calculations on the History Panel - Multiple Button sounds, and button sound is mutable URL schemes: HCDayCalc:// Download it now and feel of this calculator is how classic
Screenshots
Verdict
The clearest difference is rating: DayCalc at 4.7 against Jumbo Calculator's 3.6. DayCalc also leads on review sentiment (87% vs 50%) and device support (4 vs 1). Jumbo Calculator's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price, ratings volume and update cadence 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. DayCalc sells 4 one-off in-app purchases. Jumbo Calculator asks for nothing beyond the download.
DayCalc holds the better App Store score, 4.7 against 3.6. Both are backed by a comparable volume of ratings — 76 and 128 respectively. Written reviews point the same way: 50% of Jumbo Calculator's written reviews are positive against 87% of DayCalc's.
Jumbo Calculator ships an update monthly, DayCalc every 3 weeks. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.
| Parameter | Jumbo Calculator | DayCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (76 ratings) | 4.7 (128 ratings) — better |
| Positive reviews | 49.6% of reviews | 87.2% of reviews — better |
| Number of ratings | 76 | 128 — better |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 9.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 23 MB | 170 MB |
| Age rating | 4+ | 4+ |
| Developer | Christopher Weems | 良峰 侯 |
Customer experience
Jumbo Calculator
DayCalc
User reviews
Jumbo Calculator
From 76 App Store ratingsWhat we love
- 👍 Simple and easy to use
- 💡 Large, clear buttons
- 🚀 Fast and responsive
- 🔒 No ads or distractions
Room to improve
- 🐛 Lacks basic features like percentage button
- 🔢 Limited functionality for advanced calculations
- 🧠 Does not respect order of operations
DayCalc
From 128 App Store ratingsWhat we love
- 👍 Easy to use and convenient
- 💯 All-in-one calculator with multiple functions
- ✨ Customizable themes and backgrounds
- 🧮 Supports fraction calculations
- 📈 History and memory functions available
Room to improve
- ⚠️ Ads can be intrusive
- 🐛 Some users experience update issues
- ❌ Weight conversions not always available
- 🔊 Unwanted sound effects
- ❓ Ad-free cost unclear for cross-platform
Bugs and requests
Jumbo Calculator
Reported bugs
2 issues- Decimal point sometimes not recognized
- Pos/Neg function not always working as expected
Requested features
4 requests- Add percentage button
- Implement scientific calculator mode
- Include memory functions
- Add option to dim display by covering solar panel
DayCalc
Reported bugs
16 issues- Update issues, stuck in update loop
- Cannot install after removal
- Weight conversion not showing
- Keys making sound unexpectedly
- App not working after professional version update
Show 11 moreShow fewer
- App crashes after update
- Stuck on updating forever
- Calculator results in errors (e.g., 1000*10%)
- App keeps running in the background, draining battery
- Cannot change themes due to network error
- Ads still appear after purchasing ad removal
- App not opening after install
- M+ M- bug
- Text/numbers/symbols have underlines
- Standard version limits typing to four digits
- App not starting on Apple Watch
Requested features
10 requests- Add Pi button
- Improve currency conversion navigation
- iCloud support for syncing across devices
- Add background running feature
- Ability to change app icon
Show 5 moreShow fewer
- Add more theme options
- Allow notes to show on the main screen
- Email entire calculation history
- Change layout (move function buttons)
- Allow sound to be enabled in silent mode
In-app purchases
Jumbo Calculator
No in-app purchases
DayCalc
- Constants Pack$0.99
- Custom Unit Pack$1.99
- Remove Ads$3.99
Show 1 moreShow fewer
- Complete Pack$4.99
