Comparison

Kello vs Tabata Timer Fit RPG

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

Head to head
About

Kello

This app analyzes the accuracy of mechanical watches by listening to their ticking sounds through your device's microphone. It compares the watch's rhythm to the precise system clock to reveal timekeeping differences. Supports a wide range of watch frequencies and offers guidance on identifying mechanical timepieces.

Highlights
  • Microphone-based watch sound analysis
  • Comparison to iOS system clock
  • Automatic detection of 8 common watch frequencies
  • Guidance on identifying mechanical watches
  • Displays timekeeping differences
Features
Read full description

Kello analyzes the precision of mechanical watches against the iOS system clock using a microphone. How Kello works: All mechanically regulated watches are designed to start and stop 1000s of times every hour. A portion of the energy used during this starting and stopping motion is released as acoustic energy, resulting in an audible "tick-tock" sound. The regularity of this sound can be measured against the more precise, internal time-signal of iOS devices, such as the iPhone, and the resulting difference in timekeeping is displayed by Kello. Supported Watch Frequencies: Kello can automatically determine the frequency of the watch being measured based on eight of the most common frequencies used in mechanical watches. These frequencies are standard among low-, middle- and high-grade mechanical timepieces and will accommodate the vast majority of mechanical watches produced in the past 100 years. The following frequencies are supported: * 14,400 bph * 16,200 bph * 18,000 bph * 19,800 bph * 21,600 bph * 25,200 bph * 28,800 bph * 36,000 bph Recommended hardware: Kello works best with an external microphone that has an excellent frequency response between 10,000 and 20,000 Hz. How to know if your watch is mechanically regulated: There are four simple ways to determine if your watch is mechanical and can be used with Kello. 1. Look at the text on your timepiece. If the word "quartz" is featured anywhere on the watch, your watch is not mechanical. If the words "automatic" or "shock-proof" are written anywhere on the watch, there is a very high chance that your watch is mechanical and its precision can be measured by Kello. 2. If your watch has a hand that indicates the seconds, observe how frequently it moves. If the hand moves only once every second, it is very likely that your watch is not mechanical. If this hand moves several times per second or appears to sweep along in a smooth, continuous motion, your watch is most likely mechanical and its precision can be measured by Kello. 3. Turn the crown, that is used to set the hands of the watch, while it is pressed fully in. If the crown turns smoothly, your watch is not mechanical. If you can hear a ratcheting sound as you turn the crown, your watch is most likely mechanical and its precision can be measured by Kello. 4. Place the watch close to your ear and listen. If you hear a noise approximately once every second, it is unlikely that your watch is mechanical. If you hear a constant ticking noise, your watch is very likely a mechanical watch and its precision can be measured by Kello.

About

Tabata Timer Fit RPG

Features
Read full description

THE WORLD'S FIRST TABATA TIMER THAT'S ACTUALLY AN RPG GAME! Transform your boring workouts into an epic fitness adventure! Tabata Timer Fit RPG is the only Tabata timer that lets you level up your character, unlock achievements, collect equipment, and turn every workout into a rewarding gaming experience. LEVEL UP YOUR FITNESS HERO: Start as a Rookie and evolve into a Legend Gain XP for every workout completed Unlock 5 character classes with unique bonuses Build your stats: Strength, Endurance, Speed & Focus EPIC ACHIEVEMENTS & REWARDS: Unlock 15+ achievements from beginner to master Discover secret achievements for ultimate bragging rights Collect rare equipment that boosts your XP gains Show off your progress with gaming-style sharing DAILY QUESTS & CHALLENGES: Complete 3 daily quests for bonus XP Maintain workout streaks for epic rewards Perfect workout bonuses for flawless sessions Monthly challenges with legendary equipment SMART TABATA TRAINING: Fully customizable work/rest intervals (10-120 seconds) Adjustable rounds (1-20) for any fitness level Perfect workout detection (complete without pausing) Advanced analytics with gaming stats integration GAMING-STYLE PROGRESS TRACKING: RPG character progression dashboard Visual XP bars and level advancement Equipment collection with rarity system Streak tracking with fire emoji celebrations BEAUTIFUL GAMING INTERFACE: Dark theme with neon gaming aesthetics Satisfying level-up animations and sound effects Achievement popup notifications Character avatars and class progression visuals PERFECT FOR: Gamers who want to get fit Fitness enthusiasts seeking motivation Anyone who loves progression and achievements HIIT and Tabata training enthusiasts People who need engagement to maintain workout habits PREMIUM FEATURES (Optional): Unlock all character classes instantly Exclusive legendary equipment Advanced gaming analytics Priority quest rewards Finally, a workout app that's actually fun! I'm addicted to leveling up my character!" - Beta Tester This app turned my inconsistent workout routine into a daily habit. The gaming elements are genius!" - Fitness Enthusiast I've never been motivated by fitness apps before, but the RPG progression keeps me coming back every day!" - Gamer Download Tabata Timer Fit RPG now and begin your epic fitness quest! Will you become a Legend? Terms of Use: https://www.becomechad.com/terms&conditions Privacy Policy: https://www.becomechad.com/main-privacy-policy

Screenshots

Kello3 screens
Tabata Timer Fit RPG4 screens

Verdict

The call

The clearest difference is price: Tabata Timer Fit RPG at Free against Kello's $9.99. Kello's advantage is iOS requirement (13.0 vs 17.6). On ads, in-app purchases 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

Tabata Timer Fit RPG is free to download; Kello costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 8 level
Kello versus Tabata Timer Fit RPG: the parameters behind the verdict, then further details
ParameterKelloTabata Timer Fit RPG
Price$9.99Free — better
Rating2.8 (5 ratings) — better—
Positive reviews37.3% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better17.6
Further details — not scored
Size4 MB2 MB
Age rating4+4+
DeveloperColdflower Design Corp.Nikhil Kumar

Bugs and requests

Kello

Reported bugs

10 issues
  • App crashes on iPhone 5 and iOS 6
  • Signal detection fails inconsistently
  • Frequency auto-detection varies wildly on same watch
  • Unstable signal readings despite strong initial signal
  • App hangs on 'determine frequency' step
Show 5 more
  • Poor microphone compatibility with external mics
  • Results vary significantly between consecutive measurements
  • Crashes frequently during measurement process
  • Incompatibility with newer iOS versions
  • Microphone not detected on some devices

Requested features

10 requests
  • History log and data storage for watches
  • Graphical representation of timing data over time
  • Average readings over longer time periods
  • Watch profile saving functionality
  • Beat error measurement capability
Show 5 more
  • Export feature for timing results
  • Fine-tuning control for amplification slider
  • Improved signal detection algorithm
  • Better microphone sensitivity recommendations
  • Compatibility with more iOS versions

Tabata Timer Fit RPG

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Kello

No in-app purchases

None

Tabata Timer Fit RPG

No in-app purchases

Questions

Is Kello free?
Kello costs $9.99, with no in-app purchases.
Is Tabata Timer Fit RPG free?
Tabata Timer Fit RPG is free to download, with no in-app purchases.
Do Kello or Tabata Timer Fit RPG have ads?
Neither Kello nor Tabata Timer Fit RPG shows ads.

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