Comparison

Timer Machine vs Acid Interval

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

Head to head
About

Timer Machine

Manage your time effectively with three customizable timers. Set personalized alert sounds to suit your workflow for work, study, or personal projects. This app offers an intuitive interface for a more organized approach to your day.

Highlights
  • Three personalized timers
  • Customizable alert sounds
  • User-friendly interface
  • Time management for work and study
  • Intuitive design
Features
Read full description

Discover the ease of time management with Timer Machine, an app offering three personalized timers in a user-friendly and intuitive interface. Customize each timer to fit your unique needs, complete with your preferred alert sounds. Ideal for efficiently tracking various activities, Timer Machine simplifies your daily routine, whether it's for work, study, or personal projects. Embrace a more organized approach to your time with this elegantly designed app. Download Timer Machine now and experience the simplicity of personalized timing!

About

Acid Interval

This focus timer offers a visually unique approach to deep work, moving away from traditional interfaces. It provides customizable timers and engaging visual feedback to help users stay on task, even with the screen off. The app prioritizes a distraction-free experience with no account or data syncing required.

Highlights
  • Unique visual interface
  • Customizable timer intervals
  • Engaging animation mechanisms
  • Screen-off notifications
  • No account or data sync
  • Phone lock compatibility
Read full description

A focus timer worth looking at. Most focus timers look like a spreadsheet with a countdown in it. This one is built the other way round. A single enormous numeral, bleeding off the edge of a field of acid green. Behind it, a mechanism that moves once per second, locked to the clock and never drifting. Rings that bounce, breathe, ripple inward, or pass momentum down a Newton's cradle. When you start a session the whole field inverts to black and the numbers light up like something switched on behind them. Tap anywhere to start. Swipe to change the mechanism. Double-tap to change the colour. You never have to open a menu. 25/5, 50/10, 90/20, or count up. The classic pomodoro, longer ultradian blocks, or open-ended flow when you don't want a deadline. Timed properly. Built on timestamps, not ticks. Lock your phone, switch apps, come back: it is exactly where it should be. It tells you when you are done, even with the screen off. No account. No sync. No data leaves your phone. ACID INTERVAL PRO One payment unlocks all eight mechanisms, all seven colourways, and custom interval lengths. The timer itself is free and always will be.

Screenshots

Timer Machine3 screens
Acid Interval4 screens

Verdict

The call

The clearest difference is rating: Acid Interval at 5.0 against Timer Machine's 3.8. Timer Machine's advantage is in-app purchases (none vs 1) and ratings volume (20 vs 1). On price and ads 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. Acid Interval sells 1 one-off in-app purchase. Timer Machine asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Acid Interval holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Timer Machine has 20 ratings behind it against 1, so its average is the more settled of the two.

Scorecard6 real differences · 4 level
Timer Machine versus Acid Interval: the parameters behind the verdict, then further details
ParameterTimer MachineAcid Interval
PriceFreeFree
Rating3.8 (20 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings20 — better1
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size14 MB1 MB
Age rating4+4+
DeveloperMontage App, Inc.Preston Carr

Customer experience

Timer Machine

All ratings20 ratings
Positive65.0%
Neutral5.0%
Negative30.0%
Written reviews14 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Acid Interval

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Timer Machine

No in-app purchases

1 purchases

Acid Interval

One-time1
  • Acid Interval Pro$2.99

Questions

Is Timer Machine free?
Timer Machine is free to download, with no in-app purchases.
Is Acid Interval free?
Acid Interval is free to download, with in-app purchases available.
Which has better reviews, Timer Machine or Acid Interval?
Acid Interval is rated higher. Timer Machine averages 3.8 out of 5 from 20 ratings, while Acid Interval averages 5.0 from 1 ratings.
Do Timer Machine or Acid Interval have ads?
Neither Timer Machine nor Acid Interval shows ads.

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