Comparison

스트롱스트롱 vs Routine Interval Timer

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

Head to head
About

스트롱스트롱

Features
Read full description

"오늘 자기 전에 생각 많이 날 거야" 당신을 여기서 제일 잘하는 사람으로 만들어줄 운동 파트너가 왔습니다. [주요 기능] 예술적인 동기부여 멘트: "운동 많이 된다", "스트롱 스트롱!", "오늘 스트레스 많이 받을거야" 운동의 결이 달라지는 마법의 어록. 포기 방지 가스라이팅(?): "한 판 쉴래? 근데 남들은 안 쉬어." 소리를 들으면 멈출 수 없는 인터벌 시스템. [이런 분들께 추천합니다!] 운동 중 "잠시만요"를 입에 달고 사시는 분 옆에서 누가 계속 "진짜 도움 된다"고 해줘야 움직이는 분 오늘 밤 자기 전에 운동 안 한 걸 후회하고 싶지 않은 분 "말 안하지만 지금 스트레스 되게 받는다. 그런 스트레스도 필요해"

About

Routine Interval Timer

Features
Read full description

Repeat your workouts and focus sessions in timed sets. DDANG is a routine interval timer that keeps workouts, stretching, and focus sessions moving with short sounds and haptic cues. Set your work time, rest time, and number of sets for routines such as planks, wall sits, dead hangs, stretching, or alternating periods of focus and rest. For repeated movements, set a target count and tempo (BPM). DDANG plays cues at consistent intervals to help you keep your rhythm without losing count. You do not need to keep looking at the screen. Short sounds and haptics tell you when to start, switch phases, prepare for the end, begin the final set, and complete the routine. ■ Made for people who want to · Repeat workouts in timed sets · Train with planks, wall sits, dead hangs, and other holds · Keep count during stretching and repeated movements · Alternate between focus and rest · Continue without constantly checking the screen · Review daily activity and streaks · Record workout heart rate with a compatible watch ■ Main features · Custom labels Save routines with names such as “Plank,” “Stretching,” or “Focus.” · Time-based intervals Set work time, rest time, and the number of sets. · Start countdown Choose your preparation time before a routine begins. · Sound and haptic cues Receive brief cues for starts, transitions, final sets, and completion. · Remaining-time cues Choose when to be notified before a work or rest phase ends. · Repetition counter Set a target count and tempo (BPM) for repeated movements. · Recommended templates Quickly start routines such as planks, wall sits, and dead hangs. · Tags Organize routines by workout, study, stretching, or your own categories. · Statistics and calendar Review active time, completed sets, active days, and streaks. · Backup and restore Export your data and restore routines and records on another device. ■ Use DDANG with your watch Install DDANG on a compatible watch to sync timers created on your phone and start workouts from your wrist. · Sync timers created on your phone · Start workout timers from your watch · Configure haptics, sounds, and in-app touch lock · Record heart rate during phone-started workouts · Sync watch-completed workouts back to your phone · Review average, minimum, and maximum heart rate · See heart rate trends for each workout set Heart rate recording requires a supported watch and the appropriate permissions. Available features may vary by platform and watch model. Heart rate information provided by DDANG is intended only as a workout reference. It is not intended for medical diagnosis or treatment. ■ Keep moving without watching the screen · Start countdown: a light tick and haptic each second · Work → rest: a short transition sound and haptic · Remaining time: cues before a phase ends · Repetition counter: rhythmic cues at your selected BPM · Final set: a distinct final-set signal · Completion: a short melody and haptic Every cue is brief. DDANG uses short effects instead of spoken instructions, so it works comfortably with music without interrupting your workout or focus. ■ Records and privacy Completed routines are saved to your statistics and calendar. Review active time, completed sets, active days, and streaks, or use tags to organize your history. Routines, calendar entries, favorites, and heart rate records are stored on your devices. Heart rate recorded by your watch is transferred directly to the connected phone and is not sent to DDANG servers. Exported backup files may include workout and heart rate records. No user account or sign-in is required. Advertising and purchase SDKs operate separately under their respective policies. ■ Pricing · Basic use: Free · Ad removal: Monthly subscription or lifetime purchase For workouts and focus. Repeat and record your time in sets and beats. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

스트롱스트롱4 screens
Routine Interval Timer4 screens

Verdict

The call

The clearest difference is in-app purchases: 스트롱스트롱 at none against Routine Interval Timer's 3. 스트롱스트롱 also leads on update cadence (every 5 days vs every 2 weeks) and iOS requirement (13.0 vs 16.1). On price, ads and 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

Both are free to download. Routine Interval Timer sells 3 in-app purchases, starting at $0.99 per month. 스트롱스트롱 asks for nothing beyond the download.

UpkeepUpdate frequency

스트롱스트롱 ships an update every 5 days, Routine Interval Timer every 2 weeks. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 3 level
스트롱스트롱 versus Routine Interval Timer: the parameters behind the verdict, then further details
Parameter스트롱스트롱Routine Interval Timer
PriceFreeFree
Update frequencyEvery 5 days — betterEvery 2 weeks
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS13.0 — better16.1
Further details — not scored
Size26 MB73 MB
Age rating4+4+
DeveloperBYEONG JUN KIMMohoo Studio

In-app purchases

None

스트롱스트롱

No in-app purchases

3 purchases

Routine Interval Timer

Subscriptions1
  • Remove Ads – Monthly$0.991 Month
One-time2
  • Lifetime Ad Removal 30% Off$10.49
  • Lifetime Ad Removal$14.99

Questions

Is 스트롱스트롱 free?
스트롱스트롱 is free to download, with no in-app purchases.
Is Routine Interval Timer free?
Routine Interval Timer is free to download, with in-app purchases available.
Do 스트롱스트롱 or Routine Interval Timer have ads?
Both 스트롱스트롱 and Routine Interval Timer show ads.
Which is updated more often, 스트롱스트롱 or Routine Interval Timer?
스트롱스트롱 ships an update every 5 days, and Routine Interval Timer every 2 weeks. Most recently, 스트롱스트롱 was updated on October 10, 2026 and Routine Interval Timer on October 11, 2026.

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