Comparison

One Thing vs Periodic Table & Element Guide

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

Head to head
About

One Thing

This app blocks distracting applications until a user completes a single, meaningful daily activity. It helps users break phone addiction, reduce mindless scrolling, and build real habits through a structured approach to digital detox and focused work sessions.

Highlights
  • Blocks distracting apps until daily activity is completed
  • AI-powered activity verification
  • System-level app blocking with native iOS integration
  • Focus timer with cross-device sync
  • Streak tracking and progress analytics
  • Personalized app filters and usage caps
Features
Read full description

Stop scrolling. Start living. One Thing flips phone addiction on its head. Instead of fighting dopamine-driven habits, this app channels them — blocking distractions until you complete one meaningful activity each day. Exercise, read, meditate, do deep work, or practice an instrument. Finish first, then earn back access. The result? A daily digital detox that builds real habits, reduces mindless scrolling, and gives you hours of focus back. SUBSCRIPTION INFORMATION All features require an active subscription after the free trial period. HOW IT WORKS (Subscription Required) Pick one activity every morning: gym, reading, meditation, studying, journaling, running, walking, or any productive pursuit. Until it's done, distracting apps stay locked. No willpower needed. The environment does the work. SMART BLOCKING (Subscription Required) System-Level Control: Native iOS Screen Time integration locks apps at the deepest level Personalized Filters: Select exactly which apps to restrict based on individual triggers Flexible Scheduling: Set weekly routines, daily challenges, or immediate timed blocks Usage Caps: Limit daily or weekly opens and minutes for specific apps Emergency Unlock: Safety valve for moments when access is genuinely urgent AI-POWERED VERIFICATION (Subscription Required) Photo Proof: Snap a picture and GPT-4 Vision confirms whether the activity was actually completed Works Everywhere: From gym selfies to reading sessions, the AI adapts to any habit No Cheating: Intelligent analysis catches shortcuts and keeps accountability honest TRUE FOCUS MODE (Subscription Required) Distraction-Free Timer: Full-screen countdown for deep work, studying, or creative sessions Cross-Device Sync: Pairs with Mac for seamless focus across phone and desktop ADHD-Friendly: Structured sessions with grace periods reduce the friction of getting started PROGRESS & MOTIVATION (Subscription Required) Streak Tracking: Build momentum day after day with visual completion calendars 18-Level Progression: Journey from "Brain Rewiring" on Day 1 to "One Year Champion" Detailed Analytics: Monitor hours saved, daily completion rates, and long-term growth Milestone Alerts: Celebrate achievements at key moments throughout the journey PRIVACY & RELIABILITY (Subscription Required) On-Device Data: Personal information never leaves the phone Background Processing: Blocks stay active even when the app is closed Live Activity Widget: Persistent lock-screen reminder showing streaks and countdowns BUILT FOR Anyone trapped in a scroll-refresh-repeat cycle Students needing structured study sessions and fewer distractions Professionals seeking a digital detox during work hours Fitness-focused individuals building consistent gym or running routines People with ADHD looking for external structure and accountability Families creating healthier relationships with technology WHY IT WORKS Traditional habit trackers send reminders and hope for the best. One Thing creates real consequences: access to social media, news, and entertainment stays blocked until the daily habit is done. It's not about restricting freedom. It's about trading a dopamine loop for a life-changing routine. JOMO (joy of missing out) replaces FOMO, one day at a time. SUBSCRIPTION DETAILS Payment: Charged to Apple ID upon confirmation of purchase Renewal: Automatically renews unless cancelled at least 24 hours before the current period ends Management: Manage or cancel anytime in Apple ID Account Settings No Commitment: Cancel at any point, no penalties Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://onethingapp.framer.website/privacy-policy

About

Periodic Table & Element Guide

An interactive and offline reference for all 118 chemical elements. Explore detailed information, search, and filter elements with a clean, accessible design. Ideal for students, teachers, and chemistry enthusiasts.

Highlights
  • Interactive periodic table
  • Detailed element information
  • Offline functionality
  • Search and filter elements
  • Dark mode support
  • Save favorite elements
Features
Read full description

Periodic Table is a beautifully designed and easy to use reference app for chemistry students, teachers, and curious minds. Explore all 118 chemical elements in a clean interactive table that works perfectly on iPhone and iPad. Tap any element to instantly see clear and useful information including its symbol, atomic number, category, period, and group. Everything is available offline with no ads and no clutter, just a fast and elegant way to explore chemistry. Features Browse the complete periodic table Tap any element for detailed information Clean modern design optimised for all screen sizes Works fully offline Dark mode support Search elements by name symbol or atomic number Filter by category period or group Save favourite elements for quick access Designed with accessibility in mind Perfect for students revising chemistry, teachers in the classroom, or anyone who wants a simple and reliable periodic table on their device. Subscription Information Some features require a subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Your subscription will automatically renew unless auto renewal is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time in your App Store account settings. Terms of Service: https://reggielabs.com/terms-of-service Privacy Policy: https://reggielabs.com/privacy-policy

Screenshots

One Thing4 screens
Periodic Table & Element Guide4 screens

Verdict

The call

The clearest difference is ratings volume: One Thing at 892 against Periodic Table & Element Guide's 1. Periodic Table & Element Guide's advantage is rating (5.0 vs 4.7). On price, update cadence, ads and in-app purchases 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. One Thing sells 10 in-app purchases, starting at $7.99 per 7 days and Periodic Table & Element Guide sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Periodic Table & Element Guide holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: One Thing has 892 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

One Thing ships an update every 2 weeks, Periodic Table & Element Guide every 3 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
One Thing versus Periodic Table & Element Guide: the parameters behind the verdict, then further details
ParameterOne ThingPeriodic Table & Element Guide
PriceFreeFree
Rating4.7 (892 ratings)5.0 (1 ratings) — better
Positive reviews27.1% of reviews—
Number of ratings892 — better1
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS17.217 — better
Further details — not scored
Size227 MB8 MB
Age rating4+4+
DeveloperOne Thing LTDCourtney Rawlings

Bugs and requests

One Thing

Reported bugs

1 issue
  • Incompatible with younger users due to payment requirements

Requested features

3 requests
  • Allow multiple activities per day
  • Add chores/cleaning/meal prep blocks
  • Option to add multiple blocks

Periodic Table & Element Guide

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

One Thing

Subscriptions10
  • One Thing (Full Access) (Weekly)$7.997 Days
  • Pro Plan Monthly$8.991 Month
  • One Thing (Weekly)$12.997 Days
Show 7 more
  • Pro Plan Yearly WB$21.901 Year
  • One Thing (Full Access) (Annual)$29.991 Year
  • One Thing (Yearly - BF)7 Days trial$29.991 Year
  • One Thing Annual7 Days trial$39.991 Year
  • Pro Plan Yearly$49.991 Year
  • One Thing (Yearly)7 Days trial$49.991 Year
  • One Thing (Yearly)7 Days trial$59.991 Year
2 purchases

Periodic Table & Element Guide

Subscriptions1
  • Periodic Pro Weekly$3.997 Days
One-time1
  • Periodic Pro Lifetime$29.99

Questions

Is One Thing free?
One Thing is free to download, with in-app purchases available.
Is Periodic Table & Element Guide free?
Periodic Table & Element Guide is free to download, with in-app purchases available.
Which has better reviews, One Thing or Periodic Table & Element Guide?
Periodic Table & Element Guide is rated higher. One Thing averages 4.7 out of 5 from 892 ratings, while Periodic Table & Element Guide averages 5.0 from 1 ratings.
Do One Thing or Periodic Table & Element Guide have ads?
Neither One Thing nor Periodic Table & Element Guide shows ads.
Which is updated more often, One Thing or Periodic Table & Element Guide?
One Thing ships an update every 2 weeks, and Periodic Table & Element Guide every 3 weeks. Most recently, One Thing was updated on November 8, 2026 and Periodic Table & Element Guide on October 31, 2026.

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