Comparison

Cally.com vs one sec | screen time + focus

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

Head to head
About

Cally.com

Easily coordinate group events by suggesting dates and locations, then notifying participants of responses. Finalize the best option once enough input is received. Supports planning for social gatherings, meetings, and schedules.

Highlights
  • Create group events
  • Suggest dates and locations
  • Invite participants
  • Receive response notifications
  • Finalize event details
  • Multi-language support
Features
Read full description

With Cally, you can quickly and easily find a suitable date and location for your group event! 1. Plan In just a few simple steps you create an event, suggest locations and dates and invite the participants. 2. Respond When a participant has responded, you will receive a notification. This way you will always be informed of progress. 3. Finalize When everyone has responded or there are enough responses to make a choice, you can set the final date and location. Usage examples • A dinner, drink, (business) meeting or party • A sports schedule, a work or school roster • A course, school parent meeting, consultation or interview Do you have questions, complaints or comments? We are more than willing to help or solve any of your questions quickly. You can find the most frequently asked questions on our website or just drop us a line. The Cally app is available in English, French, German and Spanish.

About

one sec | screen time + focus

This app introduces intentional friction to distracting apps and websites, helping users reduce screen time and improve focus. It delays access rather than blocking, promoting long-term behavioral change. Integrates with other apps for enhanced productivity.

Highlights
  • Adds friction to distracting apps
  • Delays app access instead of blocking
  • Reduces app usage significantly
  • Doom Scroll Emergency Brake (Re-Intervention)
  • Free Safari extension for websites
  • Integrates with other productivity apps
Features
Read full description

Willpower is not enough against social media algorithms! That’s why I made one sec: one sec adds friction to distracting apps to make them less appealing…long-term! This principle works really well: we have gained scientific evidence in numerous research studies with the Max-Planck Institute, with the German and Danish government, and in dozens more scientific collaborations: one sec has incredible effects on your screen time: app usage drops by 57% on average! …just read our App Store reviews or try it for yourself if you don’t believe me (…you should really try it)! How is one sec different from Screen Time limits or app blockers? - one sec DELAYS access to distracting apps instead of blocking apps completely – that’s an important difference psychologically. - This way, we solve the screen time problem at its roots: long-term & sustainably! - one sec is always on, and makes using social media just slightly more annoying…so you’ll end up using it only when you actually have a reason! Which apps can I use with one sec? - You can set up one sec with any app you’d like to use less / more intentional. - Most popular use-cases are: social media, games, video streaming, dating, stock/coin trading, adult content. - Using one sec with one app of your choice if completely free, for more you’ll need to purchase one sec pro (we also need to finance development of our app!). What if I get stuck scrolling? - No worries, one sec offers a Doom Scroll Emergency Brake: We call it Re-Intervention. - After a set time (e.g. 5 minutes) you’ll be kicked out of social media, and you’ll have to go through an intervention again to unlock more time. Where can I learn more about the scientific background of one sec? → https://one-sec.app/research Can I use one sec to interrupt access to websites as well? → Yes, one sec offers a free Safari extension as well. How does one sec work technically? - one sec uses Shortcuts Automation to toggle a deep breath animation whenever you open one of the configured apps (Instagram, Twitter, YouTube…). - This breaks unconscious social media habits short-term (literally, as soon as you have set it up) and even helps long-term by adding more friction when opening these apps. Integrations: - Structured: one sec blocks apps during unfinished tasks. - LENGO: learn vocabulary to unlock social media. I developed one sec for myself in 2020…and it worked so well I decided to upload it to the App Store. Especially for people with ADHD one sec is a great tool to gain back control for incredible focus and concentration. – Frederik Legal information: Available Subscription Options: one sec pro (annual / monthly / lifetime unlock) one sec can contribute mindful moments to the Health App via HealthKit. one sec is covered by U.S. Patent 12,468,828 B2. Terms (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://one-sec.app/privacy/

Screenshots

Cally.com4 screens
one sec | screen time + focus4 screens

Verdict

The call

The clearest difference is rating: one sec | screen time + focus at 4.8 against Cally.com's 2.3. one sec | screen time + focus also leads on review sentiment (76% vs 40%) and ads (none vs shown). Cally.com's advantage is iOS requirement (11.0 vs 15.0). On price, in-app purchases and monetization model 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. Cally.com sells 1 one-off in-app purchase and one sec | screen time + focus sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

one sec | screen time + focus holds the better App Store score, 4.8 against 2.3. That said, the two scores are not equally well evidenced: one sec | screen time + focus has 24K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 40% of Cally.com's written reviews are positive against 76% of one sec | screen time + focus's.

UpkeepUpdate frequency

Cally.com ships an update monthly, one sec | screen time + focus every 2 weeks. The most recent releases landed on June 1, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 3 level
Cally.com versus one sec | screen time + focus: the parameters behind the verdict, then further details
ParameterCally.comone sec | screen time + focus
PriceFreeFree
Rating2.3 (4 ratings)4.8 (24K ratings) — better
Positive reviews40.0% of reviews75.9% of reviews — better
Number of ratings424K — better
Update frequencyMonthlyEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better15.0
Further details — not scored
Size57 MB368 MB
Age rating4+4+
DeveloperKompas Meet BVriedel.wtf apps S.L.

Customer experience

Cally.com

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

one sec | screen time + focus

All ratings23,574 ratings
Positive96.0%
Neutral1.5%
Negative2.5%
Written reviews1,609 reviews
Positive75.9%
Neutral9.4%
Negative14.7%

Bugs and requests

Cally.com

Not enough reviews yet to summarise bugs or requests.

one sec | screen time + focus

Reported bugs

4 issues
  • App switching issues
  • Interventions not triggering properly
  • Inconsistent behavior with shortcuts
  • Crashes and freezes on certain devices

Requested features

6 requests
  • Ability to block more apps for free
  • Customizable intervention timers
  • Scheduled app blocking/access
  • Passcode protection for settings
  • Sync settings across devices
Show 1 more
  • More intervention types (e.g. games)

In-app purchases

1 purchases

Cally.com

One-time1
  • Remove the ads$1.99
6 purchases

one sec | screen time + focus

Subscriptions4
  • one sec pro (1 Month)$2.991 Month
  • one sec pro | Family Plan (1 Month)7 Days trial$4.991 Month
  • one sec pro (1 Year)7 Days trial$19.991 Year
Show 1 more
  • one sec pro | Family Plan (1 Year)7 Days trial$29.991 Year
One-time2
  • one sec pro | Lifetime$99.99
  • one sec pro | Family Lifetime$149.00

Questions

Is Cally.com free?
Cally.com is free to download, with in-app purchases available.
Is one sec | screen time + focus free?
one sec | screen time + focus is free to download, with in-app purchases available.
Which has better reviews, Cally.com or one sec | screen time + focus?
one sec | screen time + focus is rated higher. Cally.com averages 2.3 out of 5 from 4 ratings, while one sec | screen time + focus averages 4.8 from 24K ratings.
Do Cally.com or one sec | screen time + focus have ads?
Cally.com shows ads; one sec | screen time + focus does not.
Which is updated more often, Cally.com or one sec | screen time + focus?
Cally.com ships an update monthly, and one sec | screen time + focus every 2 weeks. Most recently, Cally.com was updated on June 1, 2026 and one sec | screen time + focus on September 25, 2026.

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