Comparison

Mastering emotion vs KEEPER

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

Head to head
About

Mastering emotion

Features
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Emotions, whether positive or negative, are a part of our lives and can have a significant impact on our behavior and well-being.ย  Sometimes, we may ignore the emergence of these emotions, but we do change in different ways because of them.ย  Knowing how to handle our emotions is an important skill to have.ย  With this app, you can learn about different emotions and how they affect us.ย  You can also develop strategies to handle them effectively.ย  The app includes tools to help you release stress and manage your emotions, so you can feel more in control of your life.ย  Mastering your emotions has never been easier!

About

KEEPER

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This app tells you the time by voice every 10 minutes. There are only two buttons to use: start and stop, so it's easy to operate. It speaks for 4 hours. Ideal for running and training. ---- This app uses the iPhone/iPad notification function. Therefore, you will need to allow "sending notifications." Also, due to the nature of the app, it will not work properly in an environment where notifications do not arrive at the correct time. Please be careful if you are using focus mode or sleep mode. Please note that the app will not speak if the sound is on silent mode. To avoid any problems, it would be helpful if you could check the operation before using it in real life. This app does not have a reservation function. You must launch the app and register an alarm before using it. To customers using Apple Watch Voice notifications will not be available if the app is linked to an Apple Watch. If you want to hear the voice, please unlink the Apple Watch.

Screenshots

Mastering emotion4 screens
KEEPER4 screens

Verdict

The call

The clearest difference is price: Mastering emotion at Free against KEEPER's $0.99. KEEPER's advantage is in-app purchases (none vs 1) and update cadence (every 4 days vs every 10 days). On ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Mastering emotion is free to download; KEEPER costs $0.99 up front. Mastering emotion sells 1 one-off in-app purchase. KEEPER asks for nothing beyond the download.

UpkeepUpdate frequency

Mastering emotion ships an update every 10 days, KEEPER every 4 days. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.

Scorecard3 real differences ยท 3 level
Mastering emotion versus KEEPER: the parameters behind the verdict, then further details
ParameterMastering emotionKEEPER
PriceFree โ€” better$0.99
Update frequencyEvery 10 daysEvery 4 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.014.4 โ€” better
Further details โ€” not scored
Size150 MB14 MB
Age rating4+4+
DeveloperMan Hung Sunhideo nakamura

In-app purchases

1 purchases

Mastering emotion

One-time1
  • Upgrade$0.99
None

KEEPER

No in-app purchases

Questions

Is Mastering emotion free?
Mastering emotion is free to download, with in-app purchases available.
Is KEEPER free?
KEEPER costs $0.99, with no in-app purchases.
Do Mastering emotion or KEEPER have ads?
Neither Mastering emotion nor KEEPER shows ads.
Which is updated more often, Mastering emotion or KEEPER?
Mastering emotion ships an update every 10 days, and KEEPER every 4 days. Most recently, Mastering emotion was updated on October 11, 2026 and KEEPER on October 6, 2026.

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