Comparison

The Quantified Self vs Siftlee

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

Head to head
About

The Quantified Self

This app helps you manage recurring tasks and habits, prioritizing them by urgency, due date, or importance. It offers automation based on location or NFC tags, performance tracking, and workload adjustment. Organize habits into projects and review your past activities.

Highlights
  • Recurring task management
  • Habit tracking (good and bad)
  • Automation via location/NFC
  • Habit organization into projects
  • Performance tracking over time
  • Workload adjustment based on bandwidth
Features
Read full description

Manage your recurring tasks and your habits (good and bad), and see your intentions laid out by urgency, due date, or importance. You can also: - Automate your habits based on location, health, or NFC tags - Organize habits into projects - Track your performance over time - Right-size your habit workload by your available bandwidth - Peruse your timeline of past habits Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Siftlee

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You save and bookmark things all day. TikToks you swear you'll try. Screenshots of recipes you'll cook someday. A workout video from three months ago. A meme that made you laugh. A voice memo with a 2am idea. Then you can never find any of it again. The TikTok is buried under four hundred others, the screenshot is lost in your camera roll, the Instagram account goes private, the video gets taken down - and the thing you wanted to keep is just gone. Siftlee is your AI second brain. Save anything you might need later. When you want it back, just ask. And once a month, Siftlee does something no other app does with your saves: it writes you a magazine. THE SIFT - A MAGAZINE, WRITTEN FROM YOUR SAVES On the 1st of each month, Siftlee writes you a magazine about the month you just lived. The recipes you saved come back as real recipe cards. The rabbit holes you fell down become departments. The things you almost bought make the shopping pages, and the ideas worth acting on land in a shortlist at the end. It opens with an editor's letter about your month - because someone finally read all of it. Every issue gets its own color, pictures drawn for it and a puzzle made from your month. Answer The Interview or send a photo to The Assignment, and your reply prints in next month's issue. Your issues live on a bookshelf at the top of Spaces. Pull a spine down and read your own month back. Not a member yet? A free sample issue is waiting on your shelf. WHAT YOU CAN SAVE - Videos & posts: TikToks, Instagram Reels & posts, YouTube videos, X posts, articles, blog posts - anything with a URL - Images: screenshots, photos, anything from your camera roll - Audio: voice memos, podcast clips, recordings - Documents: PDFs, Word files, text files Plus: save straight from TikTok, Instagram, Safari, X, YouTube or any app - just tap Share and pick Siftlee. WHAT SIFTLEE DOES WITH IT Siftlee reads, transcribes and understands what you save - including what's said in the videos. It automatically organizes related items into Spaces (broader categories) and Threads (related items within each space) - no folders, no tags, no manual filing. Then you search your entire library in plain English ("what did I save about Sicily?", "that pasta recipe from TikTok") and get an answer with cited sources, not a list of links to dig through. WHEN THE INTERNET DELETES, YOUR LIBRARY DOESN'T Videos get taken down. Accounts go private. Threads get nuked. What Siftlee captured - the meaning, the transcript, the source - stays in your library. X posts are even saved through the official X API, so when the original disappears, your copy survives. WHY IT'S NOT JUST YOUR FAVORITES FOLDER Your TikTok favorites, your camera roll, your bookmarks - that's where saves go to pile up. You can't search them by what's inside, they don't talk to each other, and they vanish when a video does. Siftlee is one library for all of it, searchable by meaning, every save linked to its source. SIFTLEE PREMIUM Try Siftlee free: save anything - TikToks, Instagram Reels, YouTube videos, links, voice memos, documents - with a starter run of saves and searches on the house. Premium removes every limit and delivers The Sift: your own monthly magazine, on the 1st. Subscriptions are auto-renewing - current plans and pricing are shown in the app. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. PRIVACY Siftlee uses third-party AI providers to process the content you save. Full details are in our Privacy Policy. Your library is yours - delete any item or your entire account anytime. Privacy Policy: https://siftlee.com/privacy/ Terms of Use: https://siftlee.com/terms/ Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

The Quantified Self3 screens
Siftlee4 screens

Verdict

The call

The clearest difference is update cadence: Siftlee at monthly against The Quantified Self's every 7 months. The Quantified Self's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.2). On price, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. The Quantified Self sells 4 in-app purchases, starting at $1.99 per month and Siftlee sells 3 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

The Quantified Self ships an update every 7 months, Siftlee monthly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard3 real differences ยท 5 level
The Quantified Self versus Siftlee: the parameters behind the verdict, then further details
ParameterThe Quantified SelfSiftlee
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 7 monthsMonthly โ€” better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS13.0 โ€” better17.2
Further details โ€” not scored
Size39 MB34 MB
Age rating4+4+
DeveloperJared Clifton-LeeAinur Corp.

In-app purchases

4 purchases

The Quantified Self

Subscriptions4
  • Pro Monthly$1.991 Month
  • Pro Quarterly$5.493 Months
  • Pro Biannual$10.496 Months
Show 1 more
  • Pro Yearly$20.491 Year
3 purchases

Siftlee

Subscriptions3
  • Weekly$7.997 Days
  • Monthly$19.991 Month
  • Annual$79.991 Year

Questions

Is The Quantified Self free?
The Quantified Self is free to download, with in-app purchases available.
Is Siftlee free?
Siftlee is free to download, with in-app purchases available.
Do The Quantified Self or Siftlee have ads?
Neither The Quantified Self nor Siftlee shows ads.
Which is updated more often, The Quantified Self or Siftlee?
The Quantified Self ships an update every 7 months, and Siftlee monthly. Most recently, The Quantified Self was updated on November 3, 2026 and Siftlee on November 5, 2026.

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