Comparison

99 Problems vs DUAL!

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

Head to head
About

99 Problems

Navigate a minimalist world through 99 challenging levels. Evade obstacles and wall-jump your way to victory in this addictive hardcore game. Experience a seamless stream of challenges designed for maximum fun.

Highlights
  • 99 challenging levels
  • Minimalist design
  • Obstacle evasion
  • Wall-jumping mechanics
  • Hardcore fun
Features
Read full description

~ 2016 Mega Update ~ Dash your way through 99 challenging levels in this minimalist masterpiece of hardcore fun! Navigate a seamless stream of obstacles by evading and wall-jumping your way to the next checkpoint. "Very hard, super fun, extremely addictive!"

About

DUAL!

Engage in local multiplayer fun with friends using your mobile devices. Connect via WiFi or Bluetooth to play competitive or cooperative games by shooting from one screen to another. Enjoy classic duels, team defense, or goal-scoring challenges.

Highlights
  • Local multiplayer over WiFi or Bluetooth
  • Competitive and cooperative modes
  • DUEL: Classic standoff
  • DEFEND: Cooperative defense
  • DEFLECT: Goal-scoring game
  • Unlockable color sets
  • Stats, achievements, and leaderboards
Features
Read full description

Between people, across screens. DUAL is a local multiplayer game where two players use their mobile devices to shoot from one screen to the other. It's easy to pick up and play any of the competitive or cooperative modes: DUEL, DEFLECT, and DEFEND. Features: + Battle locally over WiFi or Bluetooth. + DUEL - Tilt your phone, dodge bullets, charge, and shoot your friends in this classic duel standoff. + DEFEND - Work together to defend the middle from an onslaught of attackers. + DEFLECT - Score goals by blasting, banking, and curving the ball from one screen to the other. + Only one person needs to have the full version unlocked to play DEFEND and DEFLECT with another player. + Collectable color sets unique to your device; unlock them all by playing against different people. + Single one-time in-app purchase to unlock the full game, and restore it on all your devices using the same account. + Stats, achievements, and leaderboards. "Working together right next to each other really brings back the magic of couch gaming." - Chris Carter, Destructoid "...it's a really fun way to engage with another live human, up-close and personal." - Rick Broida, CNET "You play it with someone, anywhere, and it actually brings you closer together..." - Chris Priestman, Kill Screen "...sending bullets across to someone else’s phone as you sit opposite them has a curious sense of technological magic to it." - Chris Charlton, Kaijupop Quick Troubleshooting Guide: + Make sure your WiFi is enabled and both players are on the same WiFi network. + Use Manual IP Discovery from the WiFi lobby if unable to find each other while on the same WiFi network. + To restore your purchase go to the Unlock screen and select the Restore Purchases button.

Screenshots

99 Problems4 screens
DUAL!4 screens

Verdict

The call

The clearest difference is ratings volume: DUAL! at 2.4K against 99 Problems's 38. 99 Problems's advantage is rating (4.3 vs 4.1) and review sentiment (74% vs 65%). On price, update cadence, ads and in-app purchases 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. 99 Problems sells 1 one-off in-app purchase and DUAL! sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

99 Problems holds the better App Store score, 4.3 against 4.1. That said, the two scores are not equally well evidenced: DUAL! has 2.4K ratings behind it against 38, so its average is the more settled of the two. Written reviews point the same way: 74% of 99 Problems's written reviews are positive against 65% of DUAL!'s.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 6 level
99 Problems versus DUAL!: the parameters behind the verdict, then further details
Parameter99 ProblemsDUAL!
PriceFreeFree
Rating4.3 (38 ratings) — better4.1 (2.4K ratings)
Positive reviews74.2% of reviews — better64.7% of reviews
Number of ratings382.4K — better
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS6.1 — better11.0
Further details — not scored
Size24 MB14 MB
Age rating4+4+
DeveloperMamau ApSSeabaa, Inc.

Customer experience

99 Problems

All ratings38 ratings
Positive78.9%
Neutral10.5%
Negative10.5%
Written reviews93 reviews
Positive74.2%
Neutral6.5%
Negative19.4%

DUAL!

All ratings2,418 ratings
Positive76.9%
Neutral6.0%
Negative17.0%
Written reviews801 reviews
Positive64.7%
Neutral7.9%
Negative27.5%

Bugs and requests

99 Problems

Not enough reviews yet to summarise bugs or requests.

DUAL!

Reported bugs

7 issues
  • Trying to connect is not working with others
  • Cannot play with others on the same network
  • Restore purchases not working
  • Couldn't play in class
  • I can't move
Show 2 more
  • Login screen freezes
  • Incompatible with older devices

Requested features

10 requests
  • 💡 Add more game modes
  • 💡 Add single player mode
  • 💡 Add online multiplayer
  • 💡 Add more ships/characters
  • 💡 Add joystick controls
Show 5 more
  • 💡 Add more free ships/characters
  • 💡 Add AI/bots to play against
  • 💡 Add more levels/difficulty
  • 💡 Add worldwide/online multiplayer
  • 💡 Add team/doubles mode

In-app purchases

1 purchases

99 Problems

One-time1
  • Remove Ads$0.99
1 purchases

DUAL!

One-time1
  • Full Game Unlock$2.99

Questions

Is 99 Problems free?
99 Problems is free to download, with in-app purchases available.
Is DUAL! free?
DUAL! is free to download, with in-app purchases available.
Which has better reviews, 99 Problems or DUAL!?
99 Problems is rated higher. 99 Problems averages 4.3 out of 5 from 38 ratings, while DUAL! averages 4.1 from 2.4K ratings.
Do 99 Problems or DUAL! have ads?
Neither 99 Problems nor DUAL! shows ads.
Which is updated more often, 99 Problems or DUAL!?
99 Problems ships an update every 3 months, and DUAL! every 3 months. Most recently, 99 Problems was updated on October 11, 2026 and DUAL! on October 9, 2026.

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