Sample Size Calculator vs FocusFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sample Size Calculator
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The Sample Size Calculator is a free tool to assist you to calculate Sample Size. You can input your own parameters like design effect, response rate, etc. All the parameters are set by default, but you have the ability to modify them. This application applies general statistical formulas.
FocusFlow
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Focus without lifting a finger. The voice-powered app blocker and time blocking tool that turns Screen Time into your productivity system. FocusFlow Pro is a hands-free app blocker built on Apple’s Screen Time. Start a focus session, block distracting apps, and now plan tasks by voice, then get reminder notifications so nothing slips. SAY IT. DONE. Use natural voice commands like: * “Block Instagram for 30 minutes” * “Block social apps for 2 hours” NEW: VOICE TASK PLANNER + TASK REMINDERS Create tasks instantly with your voice: * “Add ‘send invoice’ to my tasks” * “Remind me about it at 4pm” * “Remind me every weekday at 9” Every task can trigger reminder notifications, so your plan stays real, even when you’re busy. ACTUALLY HARD TO BYPASS Powered by Apple Screen Time: * Blocking stays active even if the app is closed * Sessions end automatically when the timer finishes * Designed to reduce quick “just one minute” slip-ups TIME BLOCKING & FOCUS SESSIONS FOR REAL LIFE * Quick focus sessions for study or work * Repeatable routines (your go-to session setups) * Simple flow: pick apps, set time, start PRIVACY-FIRST * Voice processing on-device when possible * No voice recordings stored * Optional cloud sync (only if you choose to sign in) * No ads. No selling your data. PERMISSIONS * Screen Time: to enforce app blocking * Microphone: for voice commands (optional) * Notifications: for session + task reminders Perfect for students who need study focus, professionals managing deep work sessions, or anyone building better task routines. Requires iOS 16+ Questions? support@focusflow.cc Terms: https://www.focusflow.cc/terms Privacy: https://www.focusflow.cc/privacy Feedback: https://www.focusflow.cc/feedback
Screenshots
Verdict
The clearest difference is in-app purchases: Sample Size Calculator at none against FocusFlow's 2. Sample Size Calculator also leads on update cadence (every 6 days vs monthly) and device support (3 vs 1). On price and ads 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
Both are free to download. FocusFlow sells 2 in-app purchases, starting at $5.99 per month. Sample Size Calculator asks for nothing beyond the download.
Sample Size Calculator ships an update every 6 days, FocusFlow monthly. The most recent releases landed on September 19, 2026 and September 11, 2026 respectively.
| Parameter | Sample Size Calculator | FocusFlow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 24 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Relief Applications | Giress Kenne tsasse |
In-app purchases
Sample Size Calculator
No in-app purchases
FocusFlow
- FocusFlow Premium - Monthly$5.991 Month
- FocusFlow Premium - Annual$49.991 Year
Questions
Is Sample Size Calculator free?
Is FocusFlow free?
Do Sample Size Calculator or FocusFlow have ads?
Which is updated more often, Sample Size Calculator or FocusFlow?
Other comparisons
