Comparison

Mersenne Primes vs 心流.

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

Head to head
About

Mersenne Primes

Explore and view the digits of all known Mersenne prime numbers. Witness the generation process for extremely large primes, page by page, and locate specific digits by their sequence number.

Highlights
  • View all digits of known Mersenne Primes
  • Witness prime number generation process
  • Page-by-page digit exploration
  • Locate specific digits by sequence number
  • Generates primes using mobile CPU
Features
Read full description

Prime numbers are fundamentally important in mathematics and they are also very beautiful numbers. The largest known prime number we know now is 2^77232917-1 and it is a Mersenne Prime (a prime number of the form Mn = 2^n − 1 for some integer n which is also a prime number). The current largest Mersenne Prime number M77232917 (found in 2017 by GIMPS - Great Internet Mersenne Prime Search) has 23,249,425 digits. There is no website that can show you all the digits in a webpage because it is too huge. This app will generate and show you all digits of all known Mersenne Primes. You can also have close look of every digit page by page. The digits will be generated by your mobile phone's CPU and saved to your storage card. You will witness the whole process of the generation for the big ones (i.e. M77232917 , M74207281, M57885161, M43112609, M42643801, M37156667, ...), because it might need one day or two to print the digits all. You can also locate a digit by its sequence number. e.g. the 23249268th digit of M77232917 is 8.

About

心流.

This app helps users cultivate positive self-talk and overcome negative thought patterns through daily affirmations. It allows for personalized quote categories and reminders to build a supportive personal environment for achieving goals and strengthening resilience.

Highlights
  • Daily positive affirmations
  • Overcome negative thoughts
  • Build positive self-talk
  • Personalized quote categories
  • Set reminders and push notifications
  • Strengthen subconscious connection
Features
Read full description

有多少消极的想法在你的脑海中无休止地重复?每日自我肯定有助于你建立积极的自我暗示,修复你的心态,并改变你消极的思维模式。通过不断重复地自我肯定,你可以提高自己的执行能力,并实现自己的梦想。你可以选择你需要的语录分类,并设置提醒和推送,从而建立一个充满着自我肯定的私人环境。 积极的自我肯定不仅有助于改善你的思维模式,而且还可以作为提示和日常提醒,引导你前进,向你希望的方向前进。 自我肯定语录是简单但有力的陈述句,有助于虎加强你的潜意识和意识之间的联系。你越是加强这种联系,你在困难的局面下就越坚强果断、就越有能力。 只要你每天重复接触这些自我肯定的句子,你就可以成为你所希望成为的人,你将走向你所渴望的方向。 每日默念自我肯定的语录,至少有以下几个好处: - 有助于加强你积极的信念,有助于消除阻碍你前进的、消极的、自我怀疑的思维模式。 - 自我肯定语录帮助你把心思放在积极正面的事物上。当你将精力集中在你想要的事情上以后,你将以积极的、令人振奋的心态去实现你的目标。你将创造一种丰富充盈的心态,你将获得实现使命的决心。 - 为你打开了可能性。我们经常陷入“不可能”的思维定势,通过长期的自我肯定,我们可以消除这种不良思维。一个充满机会的世界将向你敞开。

Screenshots

Mersenne Primes4 screens
心流.4 screens

Verdict

The call

The clearest difference is update cadence: Mersenne Primes at weekly against 心流.'s every 5 weeks. Mersenne Primes also leads on iOS requirement (9.0 vs 15.0). On price, review sentiment, 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. Mersenne Primes sells 1 one-off in-app purchase and 心流. sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Mersenne Primes ships an update weekly, 心流. every 5 weeks. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Mersenne Primes versus 心流.: the parameters behind the verdict, then further details
ParameterMersenne Primes心流.
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1 — better—
Update frequencyWeekly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size60 MB171 MB
Age rating4+4+
Developer华 魏Shanghai Xiaochuang Technology Co.,Ltd

Customer experience

Mersenne Primes

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

心流.

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Mersenne Primes

One-time1
  • One Support$0.99
3 purchases

心流.

Subscriptions3
  • 心流月度会员3 Days trial$0.991 Month
  • 心流年度会员(有折扣)3 Days trial$3.991 Year
  • 心流年度会员(无折扣)3 Days trial$4.991 Year

Questions

Is Mersenne Primes free?
Mersenne Primes is free to download, with in-app purchases available.
Is 心流. free?
心流. is free to download, with in-app purchases available.
Do Mersenne Primes or 心流. have ads?
Neither Mersenne Primes nor 心流. shows ads.
Which is updated more often, Mersenne Primes or 心流.?
Mersenne Primes ships an update weekly, and 心流. every 5 weeks. Most recently, Mersenne Primes was updated on October 16, 2026 and 心流. on October 24, 2026.

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