Comparison

Stactra vs Halff

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

Head to head
About

Stactra

Features
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Stactra keeps you company while you read. Open the book you're reading and save where you are. With Stactra, talk it through up to the point you've reached and share your thoughts. If something stays on your mind, write it down as a note or a quote. Stactra is there to be your friend. Every book you finish becomes a star in your own sky. Over time that sky starts to look like you: the stories you keep coming back to, the ones you finished in a weekend, the ones that lasted a season. What you get • You can talk with Stactra about every chapter you read. • Keep your book notes so Stactra gets to know you and tells you which book you need. • Road: set out on a journey with books that never ends. • Achievements and a Year in Review you can share as a story card • One library for what you're reading, want to read, and have finished Stactra Plus adds longer conversations about your notes and a personalized Road. The free app has no ads and no time limit. Let Stactra get to know you, so it knows which book bored you and which one you finished in a single sitting. It will recommend books to match. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Halff

This app helps you track how you spend your time by prompting you every 30 minutes to categorize your activities as valuable or a waste. It provides daily, weekly, and monthly reports to visualize your time usage and identify trends.

Highlights
  • Categorize half-hour time slots
  • Customizable value/waste categories
  • Daily, weekly, and monthly reports
  • Reminder window customization
  • Sync with web and Mac dashboard
  • Ad-free experience
Features
Read full description

Halff is the honest audit of your day. Your day is 48 half hours. Every 30 minutes, Halff asks what you just did. One tap: it paid you back, or it cost you. No timer to start, nothing to stop. By evening you know where your hours went: a score out of 100, your productive hours, your wasted hours, and what ate your day. WHAT YOU GET • A reminder every 30 minutes, only between the two hours you choose. Never at night. • One tap to score, with your own categories: deep work, content, prospecting, meetings, sport, sleep, and the ones that cost you. • A daily score out of 100, built from four parts: value ratio, volume, completion, streak. • The streak: one scored half hour a day keeps it going. • Your last 30 days, your week and your month, your typical day, your focus blocks, your records. • 18 widgets, three of them on the lock screen. • Sleep read automatically from Apple Health. • Halff for Mac: a light under the notch that asks every half hour. Same account, always in sync. • A discipline report every 30 days. Halff doesn't block anything. It shows you the truth of your day, half hour by half hour. That's enough to change it. Free trial available. Subscription billed through your Apple account, cancel anytime in your settings. Terms: https://halff.io/cgu.html Privacy: https://halff.io/confidentialite.html

Screenshots

Stactra4 screens
Halff4 screens

Verdict

The call

The clearest difference is in-app purchases: Halff at none against Stactra's 4. Halff also leads on iOS requirement (16.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Stactra sells 4 in-app purchases, starting at $4.99 per month. Halff asks for nothing beyond the download.

UpkeepUpdate frequency

Stactra ships an update every 4 days, Halff every 5 days. The most recent releases landed on October 28, 2026 and October 11, 2026 respectively.

Scorecard2 real differences Ā· 6 level
Stactra versus Halff: the parameters behind the verdict, then further details
ParameterStactraHalff
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesNo — better
Monetization—Subscription
DevicesiPhoneiPhone
Requires iOS18.616.0 — better
Further details — not scored
Size58 MB16 MB
Age rating12+4+
DeveloperGokhan CaliskanUGO STEFANO DI SARIO MULLER

In-app purchases

4 purchases

Stactra

Subscriptions2
  • Stactra Plus Monthly$4.991 Month
  • Stactra Plus Annual7 Days trial$29.991 Year
One-time2
  • 10 Stactra Credit$0.99
  • 100 Stactra Credit$6.99
None

Halff

No in-app purchases

Questions

Is Stactra free?
Stactra is free to download, with in-app purchases available.
Is Halff free?
Halff is free to download, with no in-app purchases.
Do Stactra or Halff have ads?
Neither Stactra nor Halff shows ads.
Which is updated more often, Stactra or Halff?
Stactra ships an update every 4 days, and Halff every 5 days. Most recently, Stactra was updated on October 28, 2026 and Halff on October 11, 2026.

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