Comparison

RADD vs Really Bad Chess

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

RADD

Test your reflexes and improve your math skills with this fast-paced addition game. Swipe numbers to merge and add them quickly to increase your score before the timer runs out. Compete with friends and enjoy colorful, addictive gameplay.

Highlights
  • Swipe to merge numbers
  • Add numbers for score
  • Timed gameplay
  • Power-ups for boosts
  • Compete with friends' scores
  • Improve addition skills
Features
Read full description

RADD is a speed math game of adding numbers. Compete with your friend’s scores, test your reflexes, and improve your math skills in this fun and colorful brain game! How to play: - Swipe numbers together to merge them - Merged numbers are added together - Adding numbers quickly increases your score - Tap on power-ups for a boost - Be quick - the timer will run out on you! RADD (Radius + Add) will improve your addition skills or just pass the time with it’s addicting gameplay!

About

Really Bad Chess

This app reimagines chess with completely randomized pieces, offering a fresh strategic challenge. It's perfect for both seasoned players seeking a new puzzle and beginners looking to learn the fundamentals in a fun, accessible way.

Highlights
  • Randomized chess piece sets
  • AI opponent challenges
  • Ranked, Daily, and Weekly modes
  • Freeplay practice mode
  • Local multiplayer (with IAP)
  • Alternate color palettes (with IAP)
Features
Read full description

Really Bad Chess is just like chess, but with totally random pieces. Try 8 Knights, 4 Bishops, and 3 pawns — why not? As heard on NPR's Weekend Edition 5 out of 5 Stars "An essential puzzle experience for anyone even remotely interested in strategy games" - TouchArcade Whether you play chess daily, or quit just after learning the rules, this small twist will open the door to an entire new world of chess. ------WHATS IN THE “BOX”? The free version of Really Bad Chess lets you compete vs. an AI in Ranked, Daily, or Weekly Challenges. Improve your skills using the included Freeplay mode. A single in-app purchase unlocks Versus Mode so you can compete against your friends locally! It also removes ads, displays captured pieces, and adds soothing alternate color-palettes to choose from. ------REALLY BAD PRESS "Makes chess fun even if you’re really bad" - The Verge "Feels more modern than chess has ever felt" - Applenapps "Really Bad Chess takes a really bad idea and somehow manages to make it a lot of fun." - Pocket Gamer "Really good fun" - MacLife ------A WORD FROM THE DEVELOPER Chess is one of those games I always wished I enjoyed, but its commitment to beauty, elegance, and perfect balance always turned me away. Really Bad Chess removes these boring restrictions and flips chess on its head. As much as random pieces change the game in some ways, I was really surprised to notice how much the game remains the same, and how powerful some pieces are — you've never truly struggled against a pawn until you've struggled against a pawn in the back row. For chess pros, Really Bad Chess will give you a new type of challenge — the pieces & the moves are the same, but you'll have to throw out your openings and your understanding of normal patterns of play. For novice chess players (like most of us), Really Bad Chess greatly opens up the game. Instead of starting by studying openings, in your first games you'll get to discover the joy (and challenge!) of learning how to checkmate. I hope you have as much fun with Really Bad Chess as much as I did making it. -zach

Screenshots

RADD4 screens
Really Bad Chess4 screens

Verdict

The call

The clearest difference is rating: RADD at 4.8 against Really Bad Chess's 3.8. RADD also leads on ads (none vs shown) and review sentiment (81% vs 46%). Really Bad Chess's advantage is ratings volume (1.6K vs 29). On price, update cadence, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RADD sells 1 one-off in-app purchase and Really Bad Chess sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

RADD holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: Really Bad Chess has 1.6K ratings behind it against 29, so its average is the more settled of the two. Written reviews point the same way: 81% of RADD's written reviews are positive against 46% of Really Bad Chess's.

UpkeepUpdate frequency

RADD ships an update fortnightly, Really Bad Chess every 3 weeks. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

Scorecard5 real differences · 5 level
RADD versus Really Bad Chess: the parameters behind the verdict, then further details
ParameterRADDReally Bad Chess
PriceFreeFree
Rating4.8 (29 ratings) — better3.8 (1.6K ratings)
Positive reviews81.3% of reviews — better46.3% of reviews
Number of ratings291.6K — better
Update frequencyFortnightly — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size12 MB125 MB
Age rating4+4+
DeveloperToast - Apps and Software LLCZach Gage

Customer experience

RADD

All ratings29 ratings
Positive96.6%
Neutral0.0%
Negative3.4%
Written reviews16 reviews
Positive81.3%
Neutral6.3%
Negative12.5%

Really Bad Chess

All ratings1,633 ratings
Positive66.6%
Neutral9.0%
Negative24.4%
Written reviews611 reviews
Positive46.3%
Neutral16.4%
Negative37.3%

Bugs and requests

RADD

Not enough reviews yet to summarise bugs or requests.

Really Bad Chess

Reported bugs

3 issues
  • Pieces unable to move as per chess rules
  • Game freezes and crashes
  • Incorrect checkmate detection

Requested features

5 requests
  • Add draw conditions and stalemate rules
  • Implement online/multiplayer mode
  • Provide more difficulty settings
  • Allow custom piece arrangements
  • Sync progress across devices

In-app purchases

1 purchases

RADD

One-time1
  • Extra Points$0.99
2 purchases

Really Bad Chess

One-time2
  • 100 Undos$0.99
  • Full Game Unlock$3.99

Questions

Is RADD free?
RADD is free to download, with in-app purchases available.
Is Really Bad Chess free?
Really Bad Chess is free to download, with in-app purchases available.
Which has better reviews, RADD or Really Bad Chess?
RADD is rated higher. RADD averages 4.8 out of 5 from 29 ratings, while Really Bad Chess averages 3.8 from 1.6K ratings.
Do RADD or Really Bad Chess have ads?
Really Bad Chess shows ads; RADD does not.
Which is updated more often, RADD or Really Bad Chess?
RADD ships an update fortnightly, and Really Bad Chess every 3 weeks. Most recently, RADD was updated on September 27, 2026 and Really Bad Chess on September 29, 2026.

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