Comparison

Periodic Timer + Custom Sounds vs Infinity Tempo

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

Head to head
About

Periodic Timer + Custom Sounds

This app provides a simple, repeating interval timer that works in the background. It offers customizable sounds, vibration, and flexible output modes for various activities like fitness, cooking, and learning. The interface is designed to be minimalist and distraction-free.

Highlights
  • Repeating interval timer
  • Customizable sounds and vibration
  • Works in the background
  • Long intervals up to 99 hours
  • Multiple timer output modes
  • Shake to start functionality
Features
Read full description

Keep track of time without being distracted by the device! Simple and easy timer that repeats at your chosen interval. FEATURES - Many sounds to select + the ability to add custom ones. - Up to 4 pinned and up to 5 recent Quick Start items. - Long intervals - up to 99 hours! - Vibration, if the sound is off. - Works in the background. - 3 timer output modes: intervals, total time, countdown. - You can cancel or pause the timer with help of a notification. - Flexibility and minimalism. - Shake To Start - can be enabled in settings. - Prevent Lockscreen - another useful setting, the screen will not lock, while the timer is running. USE CASES Here is a list of use cases based on the real feedback: Fitness and health: - Stretching - Stationary bicycle (interval training) - On a treadmill - For HIIT - Jogging - Timed medication - Boxing Cooking - While frying potatoes - Roasting steaks - Checking an oven or a grill to prevent burning Learning & science - Foreign language learning - As a lab timer - Periodic data collection - Speech training - Presentation timing Other - Mindfulness - Communication - To have a sense of time flying away :) HELP Q: Why the timer doesn't work in the background? A: You should allow notifications. Q: How to turn off the sound and turn on the vibration? A: On the device, turn the Silent Mode on. (Side Switch) Q: How can I add a custom sound? A: There are four ways. Choose one depending where is the sound file located. * If the sound on your Mac or PC: 1. Connect the device. 2. Open Finder and select the device. 3. Select Files in the menu. There you'll find 'Periodic +' folder. 4. Drug and drop the sound file there. * From Files app on iPhone: 1. Copy the required file. 2. Open Periodic + folder and paste it. * From another app on iPhone (like Mail): 1. Open the app where the file is located. 2. Find and touch Share button (it may have different name, for example Export). 3. In the appearing Share Sheet find the list of apps. If there is no Periodic +, touch More and enable it. 4. Now select Periodic + in the Share dialog and the sound will be imported. * And the most convenient "+" button! 1. Open Sounds tab. 2. Hit the "+" button in the "Folder" section and pick your file. Q: Alert is limited for 5 seconds! A: Go to Settings app, then Periodic + > Notifications > Banner Style > Persistent. Q: How to switch the Timer Output Mode? A: To switch the Output Mode touch the timer display at the top of the screen. Q: What is Shake To Start for? A: Shake To Start setting allows to start/cancel the timer by shaking the device. Thus, you don't touch the screen, what can be useful while cooking, for example. For this mode, in order to work, the app should be open. This app has a free version with limited features. If you still have questions or suggestions, you can visit the support page (https://goo.gl/forms/pggVBcaBxdW85EGE3), the Facebook group (http://www.facebook.com/groups/PeriodicTimer/) or you can email me (periodictimer.sup@gmail.com). If you like the app - please, rate it!

About

Infinity Tempo

Features
Read full description

∞ Tempo is an interval timer with a pulse - for training, focus, and the kitchen. Completely free, with nothing to buy. Every rep traces the loop in the colour of the moment: green to work, amber to rest. Start a timer on your iPhone and your Apple Watch keeps the beat, on its own - with your live heart rate echoed back to the phone. WORK, REST, REPEAT - WITHOUT LOOKING Spoken announcements or clean beeps mark every interval, and a 3-2-1-GO count-in starts every run - with haptics on your wrist at every turn. Keep your eyes on the work, not the screen. BUILT FOR WHATEVER YOU COUNT Rounds of Tabata, a minute per tai chi form, a 25-minute focus block, a soft-boiled egg. Each timer carries its own icon, cues, and behaviour, so it does exactly the right thing when you press play. Four come built in - build the rest, reorder with a long press, and every timer follows to your wrist. ON YOUR WRIST, ON ITS OWN The Apple Watch app runs independently and syncs your timers automatically. Sports timers hold a workout session so they never sleep mid-rep - and can record the workout, your heart rate, and Activity ring credit to Apple Health. Complications put your timers right on the watch face. EVERYWHERE YOU GLANCE A Live Activity keeps the countdown on your Lock Screen and in the Dynamic Island - background the app and the timer runs right on. Home Screen and Lock Screen widgets start a timer in a tap, there's a button for Control Center, and Siri starts any timer by name. SHARE A TIMER AS A LINK Send any timer to a friend as a plain link - from the timer list or right from a run. It opens straight in their Tempo, or shows a preview in the browser first. The timer travels inside the link itself: no account, no upload. MADE YOUR WAY Seven themes - including Pride - each with a matching app icon that switches with it. Spoken voices or musical beep sets. Per-timer audio, haptics, and get-ready overrides. NOTHING LEAVES YOUR PHONE No accounts. No analytics. No ads. No servers. Your timers and settings live only on your devices; iPhone-to-watch sync happens directly between them using Apple's frameworks. Optional Health data stays in Apple Health and never leaves your devices. Even a shared timer is encoded in the link itself - no server ever sees it. Find your tempo.

Screenshots

Periodic Timer + Custom Sounds4 screens
Infinity Tempo4 screens

Verdict

The call

The clearest difference is price: Infinity Tempo at Free against Periodic Timer + Custom Sounds's $4.99. Infinity Tempo also leads on in-app purchases (none vs 3) and update cadence (monthly vs every 2 months). Periodic Timer + Custom Sounds's advantage is chart position (#154 vs unranked). On ads, device support and iOS requirement 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

Infinity Tempo is free to download; Periodic Timer + Custom Sounds costs $4.99 up front. Periodic Timer + Custom Sounds sells 3 one-off in-app purchases. Infinity Tempo asks for nothing beyond the download.

UpkeepUpdate frequency

Periodic Timer + Custom Sounds ships an update every 2 months, Infinity Tempo monthly. The most recent releases landed on November 2, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 7 level
Periodic Timer + Custom Sounds versus Infinity Tempo: the parameters behind the verdict, then further details
ParameterPeriodic Timer + Custom SoundsInfinity Tempo
Price$4.99Free — better
Rating3.9 (75 ratings) — better—
Positive reviews54.5% of reviews—
Number of ratings75 — better—
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
Best chart rank#154 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS18.017.0 — better
Further details — not scored
Size17 MB20 MB
Age rating4+4+
DeveloperVladimir KelinSonic Studio s.r.o.

Bugs and requests

Periodic Timer + Custom Sounds

Reported bugs

14 issues
  • Doesn't work in background
  • Timer doesn't work for over 59 minutes on watch
  • Custom alert audio not working
  • Alarm not working after payment
  • App doesn't open
Show 9 more
  • Timer restarts automatically
  • External speaker volume lower
  • Battery drain on Apple Watch
  • Timer stops going off after a certain number of reps
  • App crashes
  • Sound uses sound effect volume on iPad
  • Heart rate sensor stays on when running in background
  • Timer restarts automatically
  • Volume barely audible

Requested features

23 requests
  • More sound options
  • Ability to set alarm for a time of day
  • Explanation for changing display mode
  • Simultaneous timers
  • Ability to set start/end times and weekdays
Show 18 more
  • Customizable notification text
  • Apple Watch complication
  • Widget support
  • Longer vibration duration
  • Lap count and current lap time display
  • Ability to set custom alert audio
  • Option to set alarm for a specific time of day
  • Ability to set multiple timers simultaneously
  • Ability to specify number of loop cycles
  • Option to use custom MP3 files for alerts
  • Control vibration duration
  • Synchronize with iOS clock
  • More diverse vibration modes
  • Ability to add custom notification sounds
  • Turn off Apple Watch function
  • Fix iPad sound volume control
  • Add more timers
  • Make timer not restart automatically

Infinity Tempo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Periodic Timer + Custom Sounds

One-time3
  • Tip a Banana$0.99
  • Tip a Coffee$3.99
  • Donate: Bust the project!$9.99
None

Infinity Tempo

No in-app purchases

Questions

Is Periodic Timer + Custom Sounds free?
Periodic Timer + Custom Sounds costs $4.99, and also offers in-app purchases.
Is Infinity Tempo free?
Infinity Tempo is free to download, with no in-app purchases.
Do Periodic Timer + Custom Sounds or Infinity Tempo have ads?
Neither Periodic Timer + Custom Sounds nor Infinity Tempo shows ads.
Which is updated more often, Periodic Timer + Custom Sounds or Infinity Tempo?
Periodic Timer + Custom Sounds ships an update every 2 months, and Infinity Tempo monthly. Most recently, Periodic Timer + Custom Sounds was updated on November 2, 2026 and Infinity Tempo on October 12, 2026.

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