Comparison

Polym vs 24

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

Head to head
About

Polym

Enhance your memory and recall with audio-first lessons and active learning techniques. Explore a wide range of subjects through engaging courses, flashcards, and integrated memory training. Learn effectively anytime, anywhere with this distraction-free educational tool.

Highlights
  • Audio-first lessons for on-the-go learning
  • Active audio learning with flashcards
  • Spaced repetition and interleaving techniques
  • Expansive course catalog across various subjects
  • Progress tracking and due date reminders
  • Distraction-free learning interface
Features
Read full description

Polym: Remember what you learn. Polym (pronounced: poly-m) is a learning app built for the retention of foundational knowledge. Audio and text feeds deliver sets you can finish in a sitting, drawn from a catalog of essential subjects: logic, mathematics, psychology, philosophy, history, economics, and more. Embedded retrieval practice, spaced repetition, and interleaving move what you learn into long-term memory. Designed to strengthen attention with cognition tracking to keep you accountable. Some content and features require a subscription to access. What you'll immediately receive • Audio and text feeds • Active learning, spaced repetition, and interleaving • A collection of foundational knowledge, including classic book excerpts • Cognition tracking What you'll work toward • Improved retention and recall • Strengthened attention • Greater verbal fluency • Faster pattern recognition Begin with a single set. Essential for aspiring polymaths. By using this app, you agree to Apple's standard Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

24

Effortlessly add, subtract, and calculate time differences using 24-hour (military) time. Designed for professionals managing schedules and logs, it offers automatic clock wrapping and a persistent time feature for convenience.

Highlights
  • Add/subtract 24-hour time
  • Calculate time differences
  • Persistent time feature
  • Automatic clock wrapping
  • Simple, modern interface
Features
Read full description

24-Hour Time Calculator makes adding, subtracting, and scoring 24-hour (military) time fast and effortless. Whether you're a pilot, dispatcher, shift worker, or anyone managing schedules and logs, this app is designed for you. Enter start and end times, calculate time differences, or quickly solve 24-hour time math for any need. Key Features: • Instantly add or subtract 24-hour (military) time • Quickly calculate time differences for shifts, schedules, or logs • Persistent Time: Easily save and reuse a constant value - no more retyping the same number again and again • Automatic Clock Wrapping: Results always stay within 24-hour format - no more confusing answers like "25:00" • Simple, modern interface - no clutter, no ads • Designed for aviation, logistics, transportation, shift work, and anyone who needs accurate time math • Works great with typical flight plan and scheduling formats ----- How It Works: 1. Enter your starting time. (Example: "13:15" for 1:15 PM.) 2. Add or subtract the desired value. (Example: add "2:50" to get "16:05".) 3. Use the persistent time feature to save a commonly used number (like an offset or fixed block time), so you never have to re-enter it. 4. All results are automatically wrapped to the 24-hour clock - no more odd answers like "25:00". ----- Stop struggling with mental math or spreadsheets - 24-Hour Time Calculator helps you get the job done with confidence, every time.

Screenshots

Polym4 screens
243 screens

Verdict

The call

The clearest difference is price: Polym at Free against 24's $2.99. Polym also leads on ratings volume (36 vs 2) and iOS requirement (16.4 vs 18.5). 24's advantage is in-app purchases (none vs 7) and ads (none vs shown). On 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

Polym is free to download; 24 costs $2.99 up front. Polym sells 7 in-app purchases, starting at $7.99 per month. 24 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

24 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Polym has 36 ratings behind it against 2, so its average is the more settled of the two.

Scorecard7 real differences · 3 level
Polym versus 24: the parameters behind the verdict, then further details
ParameterPolym24
PriceFree — better$2.99
Rating4.6 (36 ratings)5.0 (2 ratings) — better
Positive reviews70.0% of reviews—
Number of ratings36 — better2
Update frequencyEvery 9 days—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhoneiPhone, iPad — better
Requires iOS16.4 — better18.5
Further details — not scored
Size66 MB0 MB
Age rating4+4+
DeveloperPolym App LLCRichard Montoya

Customer experience

Polym

All ratings36 ratings
Positive88.9%
Neutral2.8%
Negative8.3%
Written reviews10 reviews
Positive70.0%
Neutral10.0%
Negative20.0%

24

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

7 purchases

Polym

Subscriptions7
  • Standard Access7 Days trial$7.991 Month
  • Standard Access14 Days trial$9.991 Month
  • Standard Access14 Days trial$11.991 Month
Show 4 more
  • Standard Access7 Days trial$14.993 Months
  • Standard Access14 Days trial$19.993 Months
  • Standard Access14 Days trial$29.993 Months
  • Standard Access14 Days trial$79.991 Year
None

24

No in-app purchases

Questions

Is Polym free?
Polym is free to download, with in-app purchases available.
Is 24 free?
24 costs $2.99, with no in-app purchases.
Which has better reviews, Polym or 24?
24 is rated higher. Polym averages 4.6 out of 5 from 36 ratings, while 24 averages 5.0 from 2 ratings.
Do Polym or 24 have ads?
Polym shows ads; 24 does not.

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