TimeSpanCalc vs OneFocus
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
TimeSpanCalc
Calculate time durations between dates or specific hours. This tool helps determine the span of time by inputting start and end dates or hours. It's optimized for multitasking on iPads.
- Calculate start date
- Calculate end date
- Calculate hours
- Calculate days
- iPad multitasking support
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Simple calculator for "Time Span". This can calculate an start date, an end date, and hours or days by turns. (Requires iOS 8 or later) Adapted for iPad multitasking (Slide Over, Split View) .
OneFocus
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OneFocus turns a focus plan into one clear session across iPhone, iPad, and Mac. Choose a Focus Profile, set a duration, and see whether each device is protectedβwithout a vague all-green status hiding a problem. FOCUS YOUR WAY β’ Start 25, 50, or 90-minute sessions, or choose a custom duration. β’ Build Profiles for Deep Work, Study, Reading, and your own routines. β’ Block selected apps and websites on iPhone and iPad with Apple's Screen Time controls. β’ Use the free Mac companion to protect supported apps and websites. β’ Keep a session going with local rain, cafΓ©, train, forest, wave, and other procedural sounds. ONE SESSION, HONEST STATUS Private iCloud sync carries your active session, Profiles, schedules, history, and verified Pro status between devices. OneFocus shows iPhone Protected, Mac Protected, Waiting, Needs Permission, or Offline separately, so you know what is actually happening. Existing local sessions and history remain useful offline. HISTORY THAT EXPLAINS YOUR TIME Review Today, 7 Days, Month, and All Time. See pause-aware totals, streaks, Profile distribution, a calendar heatmap, Focus Constellation, and per-device protection intervals. Session details preserve the Profile used at the time, even if you later rename it. APPLE WORKFLOWS Use App Shortcuts for quick 25 or 50-minute starts, open History, and coordinate OneFocus with an Apple Focus through a guided Shortcut. Core actions support VoiceOver, larger text, reduced motion, and keyboard navigation. FREE AND PRO The free version includes manual sessions, one custom Profile, four sounds, a daily goal, basic iPhone/Mac connection, Flexible mode, and recent history. A single US$9.99 Pro Lifetime purchase unlocks unlimited Profiles, repeating schedules, full history, all sounds, skies, and themes, Committed mode, advanced Shortcuts, and data export. Restore purchases at any time. PRIVATE BY DESIGN No OneFocus account. No ads. No third-party tracking. Browser content and Screen Time selections are not uploaded. Sync uses your private iCloud database, and sounds are generated locally. Terms of Use: https://oneapps.studio/terms
Screenshots
Verdict
The clearest difference is in-app purchases: TimeSpanCalc at none against OneFocus's 1. TimeSpanCalc also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. OneFocus sells 1 one-off in-app purchase. TimeSpanCalc asks for nothing beyond the download.
TimeSpanCalc ships an update every 3 weeks, OneFocus every 2 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.
| Parameter | TimeSpanCalc | OneFocus |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | β |
| Update frequency | Every 3 weeks β better | Every 2 months |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Monetization | Paid | β |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 1 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Masahiko Nogami | Freedom Dimension (shenzhen) Technology Co., Ltd |
In-app purchases
TimeSpanCalc
No in-app purchases
OneFocus
- OneFocus Pro Lifetime$9.99








