RANDOM.ORG vs RandLetter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RANDOM.ORG
Generate certified true random numbers and use various randomizing tools. This app provides a coin flipper, dice roller, card shuffler, lotto quick pick, integer generator, and list randomizer, all powered by atmospheric noise for high-quality randomness.
- Certified true randomness
- Coin flipper
- Dice roller
- Card shuffler
- Lotto quick pick
- Integer generator
- List randomizer
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All randomness wasn't created equal. This app offers certified true randomness, generated with atmospheric noise and independently approved by several testing labs. (See sample certificate from eCOGRA.) You can use our randomizers for free and without ads in this official app. If you would like to support our free services, you can do so by making a donation through our website: https://www.random.org/donate - Coin Flipper with 100 different coins from Ancient Rome to 27 modern currencies - Dice Roller to roll up to six regular dice in one go - Card Shuffler to shuffle playing cards and draw them one at a time - Lotto Quick Pick with more than 170 lotteries from all around the world - Integer Generator to generate true random numbers in configurable intervals - List Randomizer to create and randomize your own lists of items RANDOM.ORG was founded in 1998 and generates certified true randomness from atmospheric noise, which for many purposes is better than the pseudo-random numbers typically used in computer programs. Our mission is the generate the highest quality true randomness and make it available to the world in useful forms.
RandLetter
Generate random letters for games or creative writing. This utility allows you to exclude specific letters and includes a countdown timer for gameplay.
- Random letter generation
- Blacklist letters
- Countdown timer
- Kennedy Games support
- Name generation
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RandLetter is a simple app that generates random letters. It is perfect for Kennedy Games, writing names or whenever you need a random letter. The app gives you the opportunity to blacklist selected letters. It also contains a timer to count down when you are playing games.
Screenshots
Verdict
The clearest difference is in-app purchases: RandLetter at none against RANDOM.ORG's 6. RandLetter also leads on rating (5.0 vs 4.6) and review sentiment (80% vs 59%). RANDOM.ORG's advantage is update cadence (every 3 months vs every 16 months) and ratings volume (1.3K vs 3). On price, ads, monetization model 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. RANDOM.ORG sells 6 one-off in-app purchases. RandLetter asks for nothing beyond the download.
RandLetter holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: RANDOM.ORG has 1.3K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 59% of RANDOM.ORG's written reviews are positive against 80% of RandLetter's.
RANDOM.ORG ships an update every 3 months, RandLetter every 16 months. The most recent releases landed on September 26, 2026 and June 1, 2026 respectively.
| Parameter | RANDOM.ORG | RandLetter |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.3K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 59.2% of reviews | 80.0% of reviews — better |
| Number of ratings | 1.3K — better | 3 |
| Update frequency | Every 3 months — better | Every 16 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 14.6 — better |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | RANDOM.ORG | Inmitto AS |
Customer experience
RANDOM.ORG
RandLetter
Bugs and requests
RANDOM.ORG
Reported bugs
3 issues- Random number generation issues (repeating numbers, inconsistent behavior)
- Compatibility problems with newer iOS versions
- Crashes when using certain features
Requested features
5 requests- Ability to paste long lists for randomization
- Support for multiple types of dice and dice rolling
- Customizable default settings
- Offline mode or local data storage
- Improved list management (sorting, reordering, etc.)
RandLetter
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RANDOM.ORG
- Card Shuffler$0.99
- Integer Generator$0.99
- Dice Roller$0.99
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- List Randomizer$0.99
- Lotto Quick Pick$0.99
- All Randomizers$2.99
RandLetter
No in-app purchases
Questions
Is RANDOM.ORG free?
Is RandLetter free?
Which has better reviews, RANDOM.ORG or RandLetter?
Do RANDOM.ORG or RandLetter have ads?
Which is updated more often, RANDOM.ORG or RandLetter?
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