Comparison

Data Rhythm vs Quantify 4

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

Head to head
About

Data Rhythm

Features
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Visualize Your Life Rhythm with Daily Data "DataRhythm" is an app that rhythmically records your daily health and lifestyle data to help you optimize your lifestyle. Do you have these concerns? Despite exercising regularly, your weight keeps going up… You’re training hard, but your performance remains inconsistent during practice or important events… You’re increasing your client visits in sales activities, yet the results are not showing… In such cases, recording your daily data with this app can reveal patterns and pinpoint causes. App Features Record various data points in one place, such as weight, steps, and visit counts Simple, rhythmic input makes daily tracking easy Visualize data trends through graphs Support rhythmical decision-making based on health and performance data By keeping track of "data" aligned with your daily life rhythm, you might uncover unexpected insights for improvement. Start using DataRhythm to bring rhythm to your life and enjoy a fulfilling daily routine! We welcome your feedback and suggestions!

About

Quantify 4

Features
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Make Your Thoughts Visible! Have you ever had trouble choosing between several things you want? "Which one do I really want the most?" "How big is the difference between my first, second, and third choices?" This app helps you turn your thoughts, preferences, and priorities into numbers, making your decisions easier to understand. **β–  Turn Your Preferences into Numbers** Add the items you want to compare and rate them based on factors such as price, performance, and design. See the results through radar charts and rankings. You can also assign different weights to the factors that matter most to you and discover how your rankings change. **β–  Get a Fresh Perspective** Not sure you can judge objectively? Ask a friend or family member to evaluate the items first. Then adjust the weights according to your own preferences. You might discover that the best choice for you is different from what you initially expected! **β–  As Easy to Use as a Calculator** Designed for quick and casual comparisons, just like using a calculator. No password setup or photo registration features. Simply focus on comparing and evaluating your options. Shopping and can't decide? Take out your phone and make a quick comparison right there in the store! Whether you're choosing something to buy or exploring your own preferences, the possibilities are up to you. Turn what's in your mind into numbers and discover what really matters to you!

Screenshots

Data Rhythm4 screens
Quantify 43 screens

Verdict

The call

The clearest difference is in-app purchases: Data Rhythm at none against Quantify 4's 1. Data Rhythm also leads on update cadence (every 3 weeks vs every 21 months). Quantify 4's advantage is ads (none vs shown) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Quantify 4 sells 1 one-off in-app purchase. Data Rhythm asks for nothing beyond the download.

UpkeepUpdate frequency

Data Rhythm ships an update every 3 weeks, Quantify 4 every 21 months. Both last shipped on October 27, 2026.

Scorecard4 real differences Β· 2 level
Data Rhythm versus Quantify 4: the parameters behind the verdict, then further details
ParameterData RhythmQuantify 4
PriceFreeFree
Update frequencyEvery 3 weeks β€” betterEvery 21 months
AdsYesNo β€” better
In-app purchasesNo β€” betterYes
DevicesiPhoneiPhone, iPad, iPod β€” better
Requires iOS16.615.0 β€” better
Further details β€” not scored
Size17 MB89 MB
Age rating4+4+
DeveloperMasaki HayashiKENJI KANEMOTO

In-app purchases

None

Data Rhythm

No in-app purchases

1 purchases

Quantify 4

One-time1
  • Remove Ads$0.49

Questions

Is Data Rhythm free?
Data Rhythm is free to download, with no in-app purchases.
Is Quantify 4 free?
Quantify 4 is free to download, with in-app purchases available.
Do Data Rhythm or Quantify 4 have ads?
Data Rhythm shows ads; Quantify 4 does not.
Which is updated more often, Data Rhythm or Quantify 4?
Data Rhythm ships an update every 3 weeks, and Quantify 4 every 21 months. Most recently, Data Rhythm was updated on October 27, 2026 and Quantify 4 on October 27, 2026.

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