Comparison

Kairos vs MIMI Private Timer

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

Head to head
About

Kairos

Features
Read full description

Most timers tell you exactly when they end. Kairos does not. Set a minimum and maximum duration, start the timer, and Kairos chooses a random moment in between. You know the range. You do not know the exact finish. That simple twist makes Kairos useful anywhere timing should stay unpredictable. USE KAIROS FOR - Meditation: sit without watching the clock - Exercise: hold effort without bracing for the last seconds - Study sessions: add flexible focus or break intervals - Interval training: Auto Repeat randomises every set so you never anticipate the next round - Party games: perfect for Hot Potato, Musical Chairs, and other pass-it-fast games FEATURES - Random timer between your chosen minimum and maximum - Clean countdown interface designed for iPhone - Hide Time Display for a more focused, less predictable experience - Auto Repeat, Overtime, and Auto Stop modes after the timer ends - Label your timers for quick recognition in Recents - Choice of built-in alarm sounds - Haptic feedback when time is up - Recents for quickly restarting favorite timer setups - Light, Dark, and System theme - No ads or sign-up required Kairos is built for the moments when exact timing gets in the way and a little uncertainty makes the experience better.

About

MIMI Private Timer

Features
Read full description

MIMI Private Timer lets you play alerts through headphones for quiet, personal use. Use it for short breaks, commuting, focused work, study sessions, reminders, and private timing without disturbing people around you. Key features: Private audio alerts through headphones Simple timer setup Quiet, personal reminders Useful for work, travel, study, and daily routines Designed for situations where speaker-based playback is not appropriate This app is suitable for: commuters office workers students anyone who needs discreet personal alerts Note: A connected wired or Bluetooth headphone device may be required for the intended experience.

Screenshots

Kairos4 screens
MIMI Private Timer3 screens

Verdict

The call

The clearest difference is in-app purchases: Kairos at none against MIMI Private Timer's 2. Kairos also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support 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

Both are free to download. MIMI Private Timer sells 2 one-off in-app purchases. Kairos asks for nothing beyond the download.

UpkeepUpdate frequency

Kairos ships an update every 4 days, MIMI Private Timer every 6 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard2 real differences ยท 4 level
Kairos versus MIMI Private Timer: the parameters behind the verdict, then further details
ParameterKairosMIMI Private Timer
PriceFreeFree
Update frequencyEvery 4 days โ€” betterEvery 6 days
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS15.1 โ€” better17.0
Further details โ€” not scored
Size36 MB10 MB
Age rating4+4+
DeveloperBenno KohrsRyoma Inoue

In-app purchases

None

Kairos

No in-app purchases

2 purchases

MIMI Private Timer

One-time2
  • Remove Ads$0.99
  • Buy me a coffee$2.99

Questions

Is Kairos free?
Kairos is free to download, with no in-app purchases.
Is MIMI Private Timer free?
MIMI Private Timer is free to download, with in-app purchases available.
Do Kairos or MIMI Private Timer have ads?
Neither Kairos nor MIMI Private Timer shows ads.
Which is updated more often, Kairos or MIMI Private Timer?
Kairos ships an update every 4 days, and MIMI Private Timer every 6 days. Most recently, Kairos was updated on October 25, 2026 and MIMI Private Timer on October 24, 2026.

Other comparisons