Big Number Calculator+ vs Randomizer Generator Selector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Big Number Calculator+
Perform calculations with extremely large numbers, up to 66,000 digits. Supports addition, subtraction, multiplication, and division, with options for different calculation engines and data input methods. Results can be saved and printed in formatted text files.
- Handles up to 66,000 digits
- Addition, subtraction, multiplication, division
- Selectable calculation engines (Swift, Objective-C)
- Load data from files (txt, rtf, rtfd)
- Automatic data formatting for printing and saving
- Customizable number separators
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“Big Number Calculator+” is an application that can calculate very large numbers. The format that can be used is decimal (integer). The calculation functions that can be used are addition, subtraction, multiplication, and division. The number of digits is limited to 66000 digits. Only plus signs can be used. Minus signs cannot be used. The calculation engine used in the calculation can be selected from “Swift” and “Objective-C”. You can also view the source code of the calculation engine. Please use at your own risk. Only numerical values (1,2,3,4,5,6,7,8,9,0) are extracted from the input data. You can optionally enter non-numeric characters. It can be used as a delimiter. It can be load from a file in addition to direct input. Input data and calculation results are automatically formatted for printing and saving. The save file is saved in text format (.txt). "Big Number Calculator" for macOS is also available. Main Specifications • iOS 13 and iPadOS 13 or later Main functions Maximum number of digits of input data • 66000 digits Calculation function • Addition, subtraction, multiplication, division The algorithm uses the "brush calculation method". The division is displayed as “quotient and remainder". Calculation engine • “Swift” and “Objective-C” can be selected. Numeric format • Decimal number (integer) Only the plus sign can be used as the sign. Minus signs cannot be used. Numerical input • Only numerical values (1,2,3,4,5,6,7,8,9,0) are extracted. • Characters other than numerical values can be entered in the option settings. Can be used as a delimiter. Load from file • The file types that can be load are "txt, rtf, rtfd". Data replacement and registration • Input data and calculation results can be replaced by dragging and dropping. It can also be registered in the register. Separation • Separate with the selected delimiter (comma and space). • Separate by the selected number of separation digits (3, 6, 10, 16, 24). Any number of separation digits can be entered. Printing • Input data and calculation results are automatically formatted. Save • Input data and calculation results are automatically formatted. • The file format is text (.txt) format. Source code • The source code of the calculation engine can be displayed. Please use at your own risk.
Randomizer Generator Selector
This app provides a suite of tools for generating random numbers, rolling dice, flipping coins, and making decisions. It's designed for various uses, from classroom activities and giveaways to game nights and everyday choices.
- Customizable number generation
- Multi-dice rolling
- Animated coin flips
- Bingo number caller
- Random selector tools
- Exportable results
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Random Number Generator, Dice Roller & Coin Flipper — the complete RNG and decision maker. Pick numbers, roll dice, flip a coin, toss heads or tails, and more. One app for every random choice you need. THE FASTEST NUMBER RANDOMIZER ON YOUR PHONE Need a fair random number picker for a raffle, giveaway, classroom draw, or game? Set any range — 1 to 10, 1 to 1,000, or any custom minimum and maximum — choose how many numbers to generate, and get instant results. Sort numbers, exclude repeats, or export your full list to a spreadsheet with one tap. DICE ROLLER — ANY DICE, ANY COUNT Roll 1 to 10 dice at once. Choose standard 6-sided dice, a D20, D100, or any custom side count. Every roll comes with a satisfying animation and a clear result. A powerful dice roller built for games, classrooms, tabletop RPGs, and quick random decisions. COIN FLIPPER — HEADS OR TAILS, INSTANTLY Flip a coin in one tap. Animated, fair, and simple. Whether you need a quick coin toss to settle a bet, split a decision, or choose between two options, just tap and let heads or tails decide. BINGO NUMBER GENERATOR Host a bingo night without the physical barrel. Draw numbers one by one with no duplicates and no setup. Great for home games, classroom bingo, birthday parties, and team events. Clean display, easy to read, and simple to use. RANDOM SELECTOR & DECISION MAKER Torn between two options? Cannot agree on what to eat, who goes first, or which team gets the pick? Use the Yes / No tool, random letter picker, color generator, date randomizer, or playing card draw. Every tool you need to hand a decision to chance — fairly and instantly. FULL TOOL LIST • Random Number Generator — custom range, quantity, exclusions, and export • Dice Roller — 1–10 dice, any number of sides, animated rolls • Coin Flipper — animated heads or tails with a single tap • Bingo Number Generator — no-duplicate sequential draw • Random Card Draw — full standard deck, shuffle any time • Random Letter Picker — A–Z or custom alphabet • Random Color Generator — discover a new color instantly • Random Date & Time — great for games, challenges, and planning • Yes / No Randomizer — quick decision maker in your pocket • Rock Paper Scissors — play against randomness WHAT PEOPLE USE IT FOR • Picking lottery, raffle, and giveaway numbers fairly • Running classroom random number draws • Game night dice rolls and coin tosses • Bingo caller for home, classroom, and party games • Random team selector and group splitter • Daily decision maker for anything undecided • Secret Santa number and name assignments • Probability and statistics practice • Tabletop RPG dice rolls without physical dice GO PREMIUM — AD-FREE, EVERYTHING UNLOCKED Upgrade to remove ads across every tool and unlock the full export experience. Monthly and annual plans are available. Cancel anytime through your App Store account. Download Random Number Generator free. Set a range, flip a coin, roll dice, or let the app decide — all in under a second. Terms: https://sites.google.com/view/random-number-generator-app/terms Privacy: https://sites.google.com/view/random-number-generator-app/home
Screenshots
Verdict
The clearest difference is rating: Randomizer Generator Selector at 5.0 against Big Number Calculator+'s 3.7. Randomizer Generator Selector also leads on iOS requirement (13.0 vs 15.0). Big Number Calculator+'s advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, ratings volume, update cadence 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. Randomizer Generator Selector sells 2 in-app purchases, starting at $3.99 per month. Big Number Calculator+ asks for nothing beyond the download.
Randomizer Generator Selector holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 5 respectively.
Big Number Calculator+ ships an update every 4 months, Randomizer Generator Selector every 2 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.
| Parameter | Big Number Calculator+ | Randomizer Generator Selector |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 | 5 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Kunio Takeuchi | JanoGroup LLC |
Customer experience
Big Number Calculator+
Randomizer Generator Selector
In-app purchases
Big Number Calculator+
No in-app purchases
Randomizer Generator Selector
- Monthly - Premium$3.991 Month
- Annual — Premium 19.99$19.991 Year
Questions
Is Big Number Calculator+ free?
Is Randomizer Generator Selector free?
Which has better reviews, Big Number Calculator+ or Randomizer Generator Selector?
Do Big Number Calculator+ or Randomizer Generator Selector have ads?
Which is updated more often, Big Number Calculator+ or Randomizer Generator Selector?
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