The one sec Insider’s Guide

Everything we know about one sec in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.

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ToolGPAOctober 2026

one sec

The Insider’s Guide

Screen time app that adds a pause before distracting apps open

Every plan, grade, refund rule and rival among focus apps, read from one sec’s own pages.

Made by riedel.wtf apps S.L. · checked Oct 9, 2026 · toolgpa.com

3.0GPA

01WelcomeWhat it is, who it suits, its grades and the ten things to know first
02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
03What it doesIts main features, where it runs, what it works with and who makes it
04Where it standsIts grades against its category, and whether to keep it or make your own
05The alternativesThe tools it is most often weighed against, side by side
06Quick answersThe questions people ask about it, each answered in a line or two
07About ToolGPAWho made this guide, what else is on the site, and how to cite it

ToolGPA put this guide together from one sec’s own pages, its app-store listings and our grades. Every fact in it is on one sec’s page too, where it is kept up to date. Checked Oct 9, 2026.

Part 01 · Overview

Welcome

What it is, who it suits, its grades and the ten things to know first

3.0

GPA, above 51 of the 65 other focus apps we grade

one sec is a screen time app that inserts a short pause, such as a breathing exercise, before a chosen app or website opens, so that opening it becomes a deliberate choice. It can also block apps and sites outright during a session or on a schedule, and interrupt again after a set time inside an app. It runs on iPhone, iPad, Android and Mac, with a browser extension for desktop browsers.

To get you started, here are 9 things to know about one sec, taken from its own pages and our grades.

1
Best for people who open Instagram on autopilot
If you'd switch it off in a weak moment, look elsewhere.
2
Paid plans start at $1.67 a month when paid by the year
As its pricing page puts it: $3.99 / month, or $19.99 / year (US web store price).
3
There is a free plan
The breathing interruption and Re-Intervention for one app or website, with no ads.
4
It runs on 3 platforms
iOS, Android and macOS, with a browser extension too.
5
Interruptions before an app opens
A short pause appears before a chosen app or site opens. Types include a breathing exercise, a mirror, a math task, rotating the phone and typing random text.
6
Re-Intervention
After a set time inside an app, for example 5 minutes, one sec sends you out and asks you to go through another interruption to unlock more time.
7
Block sessions and schedules
Chosen apps and sites can be blocked completely during a block session or at scheduled times, and interruptions can be limited to set weekdays and hours.
8
A 3.0 GPA, above 51 of 65
That is against the other focus apps we grade, on value, the free plan, features, ease of use and platforms.
9
Your call
A focus timer at its plainest counts down 25 minutes and keeps a log.

one sec at a glance

Pricing: Free plan, from $3.99 / month, or $19.99 / year (US web store price)
Free plan: Yes
Free trial: 1-week free trial of one sec pro; the web store attaches it to the annual plan
Runs on: macOS, iOS, Android, Browser extension
Made by: riedel.wtf apps S.L., since 2020
Category: Focus Apps
Our grade: 3.0 GPA, very good
Store rating: 4.8 on the App Store, 23,648 ratings

The report card

Best for people who open Instagram on autopilot

one sec puts a short pause, such as a breathing exercise, in front of the apps and sites you pick, for $19.99 a year across phone, tablet, Mac and browser. It nudges rather than locks and is easy to switch off, the free version covers one app, monthly is $6.99 in the App Store against $3.99 on its own site, Android lacks strict blocks, and some users say the pause wears off. If you'd switch it off in a weak moment, look elsewhere.

ToolGPA report cardone secGraded Oct 10, 2026

Subject	Grade	Comment
Value for money	A	$19.99 a year, about $1.67 a month, which is under the lowest quarter of this category's prices, and one payment covers your phone, tablet, Mac and browser. Students get 50% off going by the help centre. Lifetime at $99.99 is five years of the yearly price, so we'd leave it.
Free plan and trial	C	Free forever with no ads, and then the cap: one app or one website. Pick Instagram and TikTok carries on untouched. The yearly Pro plan opens with a 1-week trial.
Features	C	Ways to slow you down: breathing, a mirror, a maths task, being kicked out after 5 minutes, scheduled blocks, intention prompts and stats. It's a speed bump rather than a wall, and not all of it travels: the help centre table marks strict block sessions and website blocking as missing on Android.
Ease of use	A	4.8 from about 23,700 App Store ratings. Setup used to be the moan, with a Shortcuts automation to build per app; the version 6.0 notes from September 2026 say it's one tap on the newest iOS, and the seven-step way is still there for older iPhones.
Platforms and integrations	B	iPhone, iPad, Android and Mac, plus a browser extension for Chrome, Firefox, Safari and Edge, and it hooks into Structured, LENGO and Apple Health. No Windows or Linux app, so on those it's the browser only.

Grade point averageVery good, out of 4.03.0

An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.

Who one sec is for

Fits if you open Instagram or TikTok without thinking and want a pause, not a wall
Works for people who want the same pause on phone, Mac and browser for $19.99 a year

Who it is not for

Skip it if you know you'd just turn it off, because several users say that's easy to do
Tight if you're on Android, where one sec's help table marks strict blocks and website blocking as missing
Tight if you're staying free and have more than one app you can't put down
Pricey if you pay monthly in the App Store, where it's $6.99 against $3.99 on one sec's own site
Watch out: there's no Windows or Linux app, and the $29.99 Family Plan doesn't say how many people it covers

Good to know

Good for

People who want a pause before social apps rather than a hard block
Using one purchase across iPhone, Android, Mac and desktop browsers
Teams and schools buying multi-seat licenses

Worth knowing

The free version covers a single app or website; adding more needs one sec pro.
The price depends on where you buy: one sec's web store charges $3.99 a month in the US, while the US App Store lists the monthly purchase at $6.99.
No Windows or Linux desktop app is listed; on those systems one sec runs only as a browser extension.
one sec's pages disagree on Android: its help table marks website blocking and strict block sessions as unavailable, while the Play listing describes blocking apps and websites.

Part 02 · Pricing

What it costs

Every plan, the free plan, ways to pay less and how prices have moved

$1.67

A month to start, paid by the year. There is a free plan too

one sec has a free plan. Paid plans start at $3.99 / month, or $19.99 / year (US web store price).

Free forever with no ads, and then the cap: one app or one website.

From our grade for free plan and trial

Free
$0
The breathing interruption and Re-Intervention for a single app or website, with no ads.
one sec pro (annual)
$19.99
per year, after a 1-week free trial
Unlimited apps, other interruption types, website interruptions, block sessions and time tracking. Same price on the US App Store.
one sec pro (monthly)
$3.99
per month, US price on the vendor's web store
The same Pro features paid month to month. The US App Store lists its monthly in-app purchase at $6.99.
one sec pro (lifetime)
$99.99
one-time purchase
Pro features for a single payment, at the same price on the web store and the US App Store.
Multi-seat plan
From $9.99
per seat / year, at 50 or more seats
Team and school licenses from the web store: $15.99 per seat a year for 4 to 9 seats, $12.99 for 10 to 49 and $9.99 for 50 or more.
Family Plan
$29.99
per year, US App Store in-app purchase
Also listed at $9.99 a month or $149 for a lifetime family unlock. The listing does not say how many people it covers.

The free plan

The breathing interruption and Re-Intervention for one app or website, with no ads.

Trying it first

1-week free trial of one sec pro; the web store attaches it to the annual plan

Read from web.one-sec.app on Oct 9, 2026.

Ways to pay less

Annual discount
Annual billing costs about 58% less than monthly
On the web store's US prices, one sec pro is $19.99 billed yearly against $3.99 a month, which comes to $47.88 over twelve months.
Stated on web.one-sec.app
Lifetime license
Lifetime one sec pro for a one-time payment
The web store and the US App Store both list a lifetime unlock of one sec pro at $99.99, paid once.
Stated on web.one-sec.app
Education
50% discount for students
one sec's help center says it offers students a 50% discount on one sec pro. The article does not describe how to claim it.
Stated on tutorials.one-sec.app
Other savings
Lower per-seat prices from 4 seats
In the web store the annual US price per seat falls from $19.99 to $15.99 at 4 seats, $12.99 at 10 seats and $9.99 at 50 seats.
Stated on web.one-sec.app
By country
Lower price shown to buyers in India
On October 9, 2026 the web store's price list set the annual plan at ₹429 with tax for India, and showed ₹363.56 before tax when read from there. Read from the United States it showed $19.99.
Stated on web.one-sec.app

What the app costs elsewhere

Each country’s App Store price for “one sec pro (1 Year)”, against $19.99 in the United States, in dollars at the day’s rate. The four cheapest and the four dearest of 11.

Country	Price there	In dollars	Against the US
Turkey	₺199,99	$4.07	80% less
India	₹ 429	$4.43	78% less
Indonesia	Rp 99ribu	$5.54	72% less
Brazil	R$ 29,90	$5.97	70% less
Germany	14,99 €	$16.80	16% less
Australia	$29.99	$20.94	about the same
Canada	$29.99	$21.08	5% more
United Kingdom	£19.99	$26.43	32% more

Part 03 · Features

What it does

Its main features, where it runs, what it works with and who makes it

Places it runs: macOS, iOS, Android and Browser extension

Screen time app that adds a pause before distracting apps open. Here is what it does, as its own site describes it, and what it covers: one-time purchase, site & app blocker.

No Windows or Linux app, so on those it's the browser only.

From our grade for platforms and integrations

Interruptions before an app opens: A short pause appears before a chosen app or site opens. Types include a breathing exercise, a mirror, a math task, rotating the phone and typing random text.
Re-Intervention: After a set time inside an app, for example 5 minutes, one sec sends you out and asks you to go through another interruption to unlock more time.
Block sessions and schedules: Chosen apps and sites can be blocked completely during a block session or at scheduled times, and interruptions can be limited to set weekdays and hours.
Browser extension: Adds interruptions and blocking to websites in Chrome, Firefox, Safari and Edge on Windows, macOS and Linux, under the same account as the phone apps.
Intention and emotion tracking: Prompts ask why you are opening an app or how you feel, alongside journaling and nudges toward alternative activities such as reading or calling a friend.
Progress statistics: Charts and comparisons show how app use has changed and how much time the interruptions have saved.

Where it runs

macOS
iOS
Android
Browser extension

What it works with

Structured
LENGO
Apple Health

one sec is made by riedel.wtf apps S.L., and has been around since 2020.

Part 04 · Standing

Where it stands

Its grades against its category, and whether to keep it or make your own

51/65

Other focus apps it is graded above

one sec's GPA of 3.0 is higher than 51 of the 65 other focus apps we grade, and level with 7.

It stands best on ease of use (A, above 45 of 65) and worst on features (C, above 3).

Its paid plans start at $1.67 a month when paid by the year, against a middle price of $2.82 for the category: 5 of the 45 others that charge start lower.

On features, ease of use and platforms it scores 3.0 out of 4. 1 tool scores higher and costs less.

Each grade against the category

Every bar is all 66 focus apps we grade, cut by the letter each got. one sec’s own letter is outlined.

AValue for money
Above 40 of 65
CFree plan and trial
Above 5 of 65
CFeatures
Above 3 of 65
AEase of use
Above 45 of 65
BPlatforms and integrations
Above 39 of 65

Price against what you get

Each dot is one of 56 focus apps. Further left costs less; higher up scores better on features, ease of use and platforms. one sec is the marked dot.

What paid plans start at, a month (each step along is roughly double) →

Keep it, or make your own?

Whether this is something you could build for yourself with an AI app builder, and what you would give up.

Your call

A focus timer at its plainest counts down 25 minutes and keeps a log.

one sec sits between: not beyond making, and not a weekend's work either. What you would give up is listed below. Whether that is worth the price is your call. At $19.99 a year it costs less than the weekend it would take to replace, which is the argument for keeping it.

What you could not

Blocking that reaches every browser and app and is hard to switch off.
Apps for macOS, iOS and Android that stay in step with each other.

What this rests on. one sec’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.

Part 05 · Alternatives

The alternatives

The tools it is most often weighed against, side by side

Opal, ScreenZen, Clearspace, Jomo and Freedom

The 5 tools one sec is most often weighed against, with where each one differs from it.

2.8GPA
Opal
Free plan · from $8.29/mo
Screen time app that blocks distracting apps on phone and Mac.
- Only one sec lists a browser extension.
- Opal also covers focus music.
one sec and Opal compared in full
3.6GPA
ScreenZen
Free
Free app that delays and blocks distracting apps and sites.
- Only one sec lists a browser extension.
- Only ScreenZen lists a Windows app.
- one sec can be bought with a one-time purchase.
one sec and ScreenZen compared in full
2.6GPA
Clearspace
Free plan · from $6.99/mo
Screen time app that adds a pause and a time limit to distracting apps.
- Only one sec lists a macOS app.
- one sec can be bought with a one-time purchase.
- Clearspace also covers time tracking.
one sec and Clearspace compared in full
2.8GPA
Jomo
Free plan · from $2.49/mo
Screen time blocker for iPhone, iPad and Mac with flexible rules.
- Only one sec lists an Android app.
- Only one sec lists a browser extension.
- Jomo also covers time tracking.
one sec and Jomo compared in full
2.2GPA
Freedom
Free plan · from $3.33/mo
Website and app blocker that runs across computers and phones.
- Only Freedom lists a Windows app.
- Freedom also covers focus music.
one sec and Freedom compared in full

Part 06 · Questions

Quick answers

The questions people ask about it, each answered in a line or two

Questions, each answered in a line or two

The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.

Is one sec free?

one sec has a free plan. The breathing interruption and Re-Intervention for one app or website, with no ads.

How much does one sec cost?

one sec lists 6 plans. Free: $0. one sec pro (annual): $19.99 per year, after a 1-week free trial. one sec pro (monthly): $3.99 per month, US price on the vendor's web store. one sec pro (lifetime): $99.99 one-time purchase.

What platforms does one sec work on?

one sec is available on iOS, Android and macOS. It also has a browser extension.

Does one sec offer any discounts?

one sec publicly lists the following: Annual billing costs about 58% less than monthly; Lifetime one sec pro for a one-time payment; 50% discount for students; Lower per-seat prices from 4 seats; Lower price shown to buyers in India.

How is one sec rated?

one sec's iPhone and iPad app averages 4.8 out of 5 from 23,648 ratings on the App Store in the United States, as read on Oct 5, 2026.

Does one sec have a Windows app?

No Windows app was listed when its pages were read on Oct 9, 2026. one sec is listed for iOS, Android and macOS.

Does one sec have a Linux app?

No Linux app was listed when its pages were read on Oct 9, 2026. one sec is listed for iOS, Android and macOS.

Is one sec open source?

one sec is not described as open source on its own site, as read on Oct 9, 2026.

What does one sec integrate with?

one sec's listing names Structured, LENGO and Apple Health. A listing names up to eight integrations, so it may connect to more.

Does one sec have a student discount?

50% discount for students. one sec's help center says it offers students a 50% discount on one sec pro.

Does one sec have a free trial?

Yes. 1-week free trial of one sec pro; the web store attaches it to the annual plan.

Who makes one sec?

one sec is made by riedel.wtf apps S.L. It dates from 2020.

What are the alternatives to one sec?

The closest alternatives to one sec in our directory are Opal, ScreenZen, Clearspace, Jomo and Freedom.

How does one sec compare with other focus apps?

one sec's GPA of 3.0 is higher than 51 of the 65 other focus apps we grade, and level with 7.

Is one sec good value for money?

ToolGPA grades one sec A for value for money. Its paid plans start at $1.67 a month when paid by the year, against a middle price of $2.82 for the category: 5 of the 45 others that charge start lower.

Could I make my own version of one sec?

A focus timer at its plainest counts down 25 minutes and keeps a log. one sec sits between: not beyond making, and not a weekend's work either.

Where this guide comes from

The prices, plans, platforms and features were read from one sec’s own pages on Oct 9, 2026, and the grades were given on Oct 10, 2026. Based on one sec's home, FAQ, platforms, about and help centre pages and its web store as of 9 October 2026, its App Store and Google Play listings, its App Store reviews and Hacker News threads about it. Also tested with a demo account on 2026-08-06.

Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by riedel.wtf apps S.L. Prices change, so check one-sec.app before you buy.

Part 07 · About

About ToolGPA

Who made this guide, what else is on the site, and how to cite it

3,189

Tools graded, in 94 categories

ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.

Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.

3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries

What else is on toolgpa.com

Scan for the live page

Prices and grades as they are today

Quoting this guide?

Please name ToolGPA and link to the live page, so readers can check the figures for themselves:

ToolGPA, "one sec: The Insider's Guide", checked Oct 9, 2026. https://toolgpa.com/tools/one-sec

Know someone choosing between focus apps?

Send them this guide: toolgpa.com/tools/one-sec/guide

ToolGPA elsewhere: youtube.com/@toolgpa

See our other guides

The best-graded focus apps after one sec, each with an Insider's Guide of its own.

ToolGPA

Choosing software? Every tool graded, every price dated.

Compare tools at toolgpa.com ›

Everything in this guide is ToolGPA’s own summary of what one sec’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. one sec is a trademark of its owner, and this guide is not made, paid for or approved by riedel.wtf apps S.L. Prices and plans change: check one-sec.app before you buy.