Comparison

Habit Detox vs Exam Countdown & Study Timer

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

Head to head
About

Habit Detox

Features
Read full description

Let go of the “bad habits” you want to quit! Habit Detox is a habit-support app that makes it easy to stick with your decision to quit by visualizing the things you can’t stop—smoking, drinking, social media, snacking, and more—using a timer. Time you’ve kept going. Money you’ve saved. Records you’ve built up. Because your effort is saved as numbers, you’ll stay motivated and keep going. ◆Key Features ・Visualize savings: Set a daily cost and see how much money you’ve saved by continuing. ・Review your streak in a calendar: The days you kept going are recorded on a monthly calendar. ・Journal: Freely log your goals, insights, temptations, and what helped you succeed. ・Reports (Premium): Analyze your streak stats and patterns to understand your habits. ・Daily reflection reminders: Get notified at your chosen time to help turn consistency into a habit. Start today—with just one second. 【Terms & Policies】 ・Terms of Use https://zinc-charger-39b.notion.site/1ae4a7a710e780da848ae11c47ad05ef ・Privacy Policy https://zinc-charger-39b.notion.site/1ae4a7a710e7808cbecdc175623ebc40 ・End User License Agreement (Apple Standard EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Exam Countdown & Study Timer

This app simulates real exam conditions with an analog clock to help you practice time management. It displays the days remaining until your target exam and offers customizable study session timers. Prepare for your tests with realistic mock exams and stay motivated with a clear view of your progress.

Highlights
  • Analog clock simulation for mock exams
  • Countdown of days until target exams
  • Customizable subject presets for exam times
  • Remaining time display with optional hide
  • End notification sound
  • Portrait and landscape orientation support
Features
Read full description

Exam Countdown & Study Timer helps you practice time management under real exam conditions. Study sessions and mock exams at home can feel just like the real test room. Most students use a stopwatch when taking mock exams at home. But real exam rooms have an analog wall clock that shows the current time. On test day, you must read that clock and work out how many minutes remain until the end. A stopwatch does not train this important skill. Exam Clock runs an analog clock starting from the exam start time you set. If your real exam starts at one thirty in the afternoon and lasts forty five minutes, pressing start shows an analog clock at one thirty that begins moving, with the end time shown below it. You practice with the exact same clock you will see on test day, so you never feel lost about timing. Exam Clock also shows the number of days until your target exam in a large tear off calendar style. You can see at a glance how many days are left, which helps keep your daily motivation high. Main features Real exam simulation clock. Set the start and end time of your exam, then choose a subject to run an analog clock at the real exam time, with the end time always shown. Subject presets. Save up to eight frequently used exam times such as Math, English, and Reading. Remaining time countdown. Show the time left during the exam, with an option to hide it for a more realistic practice. Days until exam. Register your target exam name and date to show the remaining days in large digits. End notification. A sound lets you know when the set end time is reached. Portrait and landscape. Use it as a desk clock on a charging stand in either orientation. Multiple languages. Japanese, English, Chinese, and Korean, switchable from the flags in settings. Who is it for Students preparing for university entrance exams. People aiming for certification tests. Anyone taking national qualification exams. People in medical and welfare fields preparing for their exams. Anyone who wants to practice mock exams in a realistic setting. Anyone who wants the days left until the exam always in sight. How to use First, register your target exam name and date in settings. Next, save the start and end times of the subjects you use for mock exams as presets. To begin a mock exam, choose a subject from the play button and press start. The analog clock starts moving at the real exam time. A sound notifies you at the end time. The rest of the time, keep it as a standby screen showing the date, time, and days left until your exam. Pricing The app is free to use. The free version shows a banner ad at the bottom. An in app purchase removes ads and unlocks future features. Notes This app does not replace official exam room clocks and does not guarantee official timekeeping. On test day, follow the instructions and clocks provided at your exam site. This app is a study and practice aid. Make Exam Clock your study companion and build the sense of timing you need to perform your best on test day. terms-of-service https://b19.co.jp/terms-of-service/
 privacy-policy  https://b19.co.jp/privacy-policy/

Screenshots

Habit Detox4 screens
Exam Countdown & Study Timer4 screens

Verdict

The call

The clearest difference is iOS requirement: Exam Countdown & Study Timer at 15.0 against Habit Detox's 17.5. On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Habit Detox ships an update every 10 days, Exam Countdown & Study Timer every 2 weeks. Both last shipped on September 23, 2026.

Scorecard1 real difference · 7 level
Habit Detox versus Exam Countdown & Study Timer: the parameters behind the verdict, then further details
ParameterHabit DetoxExam Countdown & Study Timer
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsYesYes
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.515.0 — better
Further details — not scored
Size6 MB46 MB
Age rating17+4+
DeveloperTomoya OhashiBEAK, K.K.

In-app purchases

None

Habit Detox

No in-app purchases

None

Exam Countdown & Study Timer

No in-app purchases

Questions

Is Habit Detox free?
Habit Detox is free to download, with no in-app purchases.
Is Exam Countdown & Study Timer free?
Exam Countdown & Study Timer is free to download, with no in-app purchases.
Do Habit Detox or Exam Countdown & Study Timer have ads?
Both Habit Detox and Exam Countdown & Study Timer show ads.
Which is updated more often, Habit Detox or Exam Countdown & Study Timer?
Habit Detox ships an update every 10 days, and Exam Countdown & Study Timer every 2 weeks. Most recently, Habit Detox was updated on September 23, 2026 and Exam Countdown & Study Timer on September 23, 2026.

Other comparisons