Comparison

Presidents vs. Aliens® vs Note Diver

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

Head to head
About

Presidents vs. Aliens®

Learn about U.S. presidents through engaging games. Test your knowledge of facts, quotes, and historical events to defeat aliens. Collect all 45 presidents and unlock bonus games.

Highlights
  • Learn presidential facts, quotes, and nicknames
  • Fling presidents at aliens to defeat them
  • Collect all 45 U.S. presidents
  • Unlock bonus games: Heads of State! and Executive Order!
  • Customize question types for different age levels
  • Informative president flash cards
  • Three games in one
Features
Currently charting
Read full description

From the creator of Stack the States! - "An educational app at its best!" - The iPhone Mom.com Presidents vs. Aliens® makes learning about the presidents fun! As you learn presidential facts, quotes, nicknames and historical events, you can use your knowledge to help the presidents defeat the aliens. Fling the presidents at the aliens to knock them all down. Use the many special objects and "Executive Powers" to increase the fun! You earn a random president for every successfully completed level. All of your presidents appear on your own personalized screen. Try to collect all 45! As you earn more presidents, you begin to unlock the free bonus games: Heads of State! and Executive Order! Three games in one! CONTROL YOUR OWN EXPERIENCE: You can select which types of questions are asked. Younger kids can start by just focusing on identifying the presidents. Older kids and adults can delve deeper into historical events and presidential facts. LEARN BEFORE YOU PLAY: Presidents vs. Aliens™ provides 45 informative president flash cards. Use them to brush up on your presidential knowledge before you play or as a handy reference tool. HAVE FUN LEARNING ALL ABOUT THE PRESIDENTS OF THE UNITED STATES: ▸ Pictures ▸ Political Party ▸ Predecessors and Successors ▸ Nicknames ▸ Quotes ▸ General Facts ▸ Historical Events FEATURES: ▸ Hundreds of unique questions ▸ 45 flash cards -- one for each president! ▸ Collect all 45 presidents and track your progress on personalized screen ▸ Earn FREE bonus games: Heads of State! and Executive Order! ▸ Works on both iPhone and iPad - a universal app ▸ Create up to five player profiles ▸ Choose any of the presidents as your avatar ▸ High resolution pictures of famous presidential landmarks ▸ All games are powered by a realistic physics engine ▸ Fun sound effects and music ▸ Retina Display support THREE GAMES IN ONE: PRESIDENTS VS. ALIENS®: Fling the presidents at the aliens. Try to knock them all down. HEADS OF STATE: Presidents are floating in space! Tap the correct ones before you get three strikes. EXECUTIVE ORDER: Drag and drop the presidents to arrange them in the correct order. Presidents vs. Aliens® is an educational app for all ages that's actually FUN to play. Try it now and enjoy three games for the price of one! PRIVACY DISCLOSURE: Presidents vs. Aliens®: - Does not contain 3rd party ads. - Does not contain in-app purchases. - Does not contain integration with social networks. - Does not use 3rd party analytics / data collection tools. - Does include links to apps by Dan Russell-Pinson in the iTunes App Store (via LinkShare). For more information on our privacy policy please visit: http://dan-russell-pinson.com/privacy/

About

Note Diver

Practice reading music by playing notes into your device's microphone to zap approaching sharks. Features real-time pitch detection, multiple clefs, and a smart practice mode. Offers a fun, gamified approach to musical education for all ages.

Highlights
  • Gamified sight-reading practice
  • Real-time instrument pitch detection
  • On-screen keyboard option
  • Multiple clefs and intervals
  • Smart Practice for missed notes
  • Family-friendly profiles
  • In-game currency for unlocks
Features
Read full description

Note Diver turns sight-reading practice into an underwater arcade game. Sharks carry music notes on signs as they swim toward your diver. To stop them, you play the right note on a real instrument — piano, guitar, or bass — into your device's microphone. Read the note. Play it cleanly. Zap the shark. Survive the deep. No instrument? Toggle the on-screen keyboard in Setup and tap notes as they appear. Perfect for trying the game before pulling out your piano, or for kids learning their first notes. WHAT MAKES IT WORK • Real-time pitch detection that handles slightly out-of-tune pianos, plucked guitar harmonics, and quiet acoustic instruments • Treble clef, bass clef, both, intervals, and chords — eight biomes of progression across coral reefs, kelp forests, sunken ships, and the abyss • A tuner built in, with a chromatic needle and string guides for guitar and bass • Smart Practice generates a drill from the exact notes you miss most • Family-friendly: each player gets their own profile (avatar + progress) so a whole household can share one device THE OCEAN HAS PERSONALITY Piranha schools attack in waves. Squid carry three-note melodies and ink over your other targets. A megalodon boss every third level. Earn coins to unlock diver suits (yes, a mermaid tail), weapons that vanquish creatures in different ways, victory emotes, and themed shark skins. PRIVACY Audio is analyzed on your device only. Nothing is recorded, stored, or sent to a server — ever. The app contains no advertising, no in-app purchases, no analytics, no accounts. WHO IT'S FOR Anyone learning to read music — from total beginners on the white keys to bass players reading off the staff. Music teachers love it as homework. Parents love that it gets kids practicing without nagging. Dive in. Read music. Save yourself from the sharks.

Screenshots

Presidents vs. Aliens®4 screens
Note Diver4 screens

Verdict

The call

The clearest difference is price: Note Diver at Free against Presidents vs. Aliens®'s $1.99. Note Diver also leads on rating (5.0 vs 4.2) and update cadence (weekly vs every 5 months). Presidents vs. Aliens®'s advantage is ratings volume (150 vs 2) and chart position (#74 vs unranked). On ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Note Diver is free to download; Presidents vs. Aliens® costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Note Diver holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Presidents vs. Aliens® has 150 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 77% of Presidents vs. Aliens®'s written reviews are positive against 100% of Note Diver's.

UpkeepUpdate frequency

Presidents vs. Aliens® ships an update every 5 months, Note Diver weekly. The most recent releases landed on November 1, 2026 and October 19, 2026 respectively.

Scorecard8 real differences · 3 level
Presidents vs. Aliens® versus Note Diver: the parameters behind the verdict, then further details
ParameterPresidents vs. Aliens®Note Diver
Price$1.99Free — better
Rating4.2 (150 ratings)5.0 (2 ratings) — better
Positive reviews77.3% of reviews100.0% of reviews — better
Number of ratings150 — better2
Update frequencyEvery 5 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#74 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size86 MB2 MB
Age rating4+9+
DeveloperFreecloud Design, Inc.James Kazam

Customer experience

Presidents vs. Aliens®

All ratings149 ratings
Positive77.2%
Neutral4.0%
Negative18.8%
Written reviews88 reviews
Positive77.3%
Neutral2.3%
Negative20.5%

Note Diver

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Presidents vs. Aliens®

Reported bugs

8 issues
  • App freezes after 3 questions
  • Questions fail to display
  • Flashcards appear blank
  • Game exits unexpectedly
  • President positioning issues on screen
Show 3 more
  • Incorrect answer options (Obama/Biden succession)
  • Duplicate Trump images with only one correct answer
  • Outdated president information after new administration

Requested features

13 requests
  • Update app with current president information
  • Add audio narration for non-readers
  • Multiplayer online gameplay
  • More questions and trivia variety
  • Difficulty settings for main game
Show 8 more
  • UK monarchy version
  • Presidents vs Aliens 2 sequel
  • Birth/death dates for presidents
  • Spanish and French language modes
  • Ability to delete player profiles
  • Bonus games with bombs
  • Identify presidents by party affiliation
  • World history or geography games

Note Diver

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Presidents vs. Aliens®

No in-app purchases

None

Note Diver

No in-app purchases

Questions

Is Presidents vs. Aliens® free?
Presidents vs. Aliens® costs $1.99, with no in-app purchases.
Is Note Diver free?
Note Diver is free to download, with no in-app purchases.
Which has better reviews, Presidents vs. Aliens® or Note Diver?
Note Diver is rated higher. Presidents vs. Aliens® averages 4.2 out of 5 from 150 ratings, while Note Diver averages 5.0 from 2 ratings.
Do Presidents vs. Aliens® or Note Diver have ads?
Neither Presidents vs. Aliens® nor Note Diver shows ads.
Which is updated more often, Presidents vs. Aliens® or Note Diver?
Presidents vs. Aliens® ships an update every 5 months, and Note Diver weekly. Most recently, Presidents vs. Aliens® was updated on November 1, 2026 and Note Diver on October 19, 2026.

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