Comparison

InstaCal vs OneVoice

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

Head to head
About

InstaCal

This comprehensive calendar app offers multiple views and integrates events with Apple Reminders. It features natural-language event creation in 12 languages and includes native apps for Mac and Apple Watch with a single purchase.

Highlights
  • Six touch-optimized calendar views
  • Integrates events and Apple Reminders
  • Natural-language Quick Add in 12 languages
  • Native Mac and Apple Watch apps
  • Customizable widgets and Live Activities
  • One-time purchase, no subscription
Features
Read full description

Your events, reminders, tasks and countdowns, together. Plan your day on iPhone and iPad, check what is next in interactive widgets and keep important dates close. ONE PURCHASE. FOUR PLATFORMS. One purchase includes four native apps: • Mac: a menu bar calendar and full calendar window. • iPhone: your agenda, widgets and Live Activities. • iPad: calendar, agenda and event details side by side. • Apple Watch: upcoming plans, tasks, countdowns and complications. No subscription, separate mobile unlock or InstaCal account to create. BUILT FOR IPHONE AND IPAD Move between Agenda, Day, Week, Month, Quarter and Year views. On iPad, see your calendar, agenda and event details side by side. Use notification controls to choose which calendars alert you and when. YOUR PLANS GO WITH YOU Check your next event, daily agenda, tasks and countdowns on Apple Watch. On your Mac, keep your calendar one click away in the menu bar. EVENTS, REMINDERS, TASKS AND COUNTDOWNS • See calendar events and Apple Reminders together. • Organize tasks in lists with tags, priorities and checklists. • Keep trips, birthdays and milestones in view with countdowns. • Join online meetings and respond to supported invitations. • See weather and moon phases alongside your plans. • Get travel-time and leave-by guidance for your next event. ADD PLANS IN YOUR OWN WORDS Type "Lunch with Sam tomorrow at noon" to create an event. Quick Add understands dates and times in 31 languages, with processing on your device. Use Quick Edit to move, rename or cancel events, or search from the same field. WIDGETS THAT KEEP PLANS CLOSE Browse dates and check off reminders in interactive widgets. Keep your agenda, next event and countdowns on your Home Screen, Lock Screen or Mac desktop, with options for supported devices. On supported iPhones, Live Activities keep upcoming plans in view on the Lock Screen and Dynamic Island. MAKE ROOM FOR YOUR DAY Switch between calendar views to see the details or the bigger picture. Use calendar sets, choose colors and display a second time zone. Your settings sync through your own iCloud. Add plans with Siri, Shortcuts or the Quick Add control on iPhone and iPad. WORKS WITH THE CALENDARS YOU USE Use calendars available through Apple Calendar, or connect Google and Microsoft accounts directly for richer event and invitation support. IN YOUR LANGUAGE The interface and natural-language Quick Add support English, German, French, Spanish, Italian, Dutch, Brazilian Portuguese, Russian, Japanese, Korean, and Simplified and Traditional Chinese. Dates, week starts and time formats follow your region. PRIVACY No advertising, tracking or usage analytics. Natural-language entry is processed on your device. Calendar connections use the providers you choose. Optional feature-request submissions and image generation send the content you provide to online services; see our privacy policy for details. WELCOME BACK InstaCal has been rebuilt for today's devices. Every previous purchaser gets the upgrade at no extra charge, however long ago they bought it. Thank you for giving us another chance. Questions? Visit instacalapp.com/support/. Some features require supported devices or services.

About

OneVoice

Features
Read full description

Talk on voice and video calls with people who don't speak your language. OneVoice translates the conversation with real-time subtitles and AI voice, in 21 languages. INVITE WITH A LINK, NO APP NEEDED Create an invite and send it via WhatsApp, email or chat. Your guest opens the link in a browser, enters a name and joins the translated call: no install, no account. WHAT YOU CAN DO - 1:1 voice and video calls with translated subtitles - Translated voice during calls, where available - Translated group calls with up to 4 participants - Private and group chats with automatic translation - Translated voice messages with text-to-speech - 1:1 conversation summaries in your language - Universal text and voice translator - Share photos, videos and documents - One account across iPhone, iPad and browser 21 LANGUAGES English, Italian, Spanish, French, German, Portuguese (Brazil), Romanian, Polish, Russian, Czech, Slovak, Slovenian, Hungarian, Estonian, Albanian, Arabic, Simplified Chinese, Japanese, Vietnamese, Filipino and Sinhala. GOOD TO KNOW Translation requires an internet connection and runs with a delay of about 2 seconds. Quality and speed may vary by language, device and connection. SUBSCRIPTION INFORMATION AND LEGAL NOTICES OneVoice offers auto-renewable monthly subscriptions. Subscriptions grant access to OneVoice's premium features—including translation, Speech-to-Text, Text-to-Speech, calling, and live call translation—subject to the credits and limits displayed within the app. Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews every month unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription by going to your Apple ID account settings. The subscription price is displayed in the app before purchase confirmation and may vary by country or region. Privacy Policy: https://onevoice.ermeslogic.com/privacy/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

InstaCal4 screens
OneVoice4 screens

Verdict

The call

The clearest difference is price: OneVoice at Free against InstaCal's $19.99. OneVoice also leads on iOS requirement (16.0 vs 18.0). InstaCal's advantage is in-app purchases (none vs 4) and chart position (#169 vs unranked). On update cadence 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

CostPrice · In-app purchases · Ads · Monetization

OneVoice is free to download; InstaCal costs $19.99 up front. OneVoice sells 4 one-off in-app purchases. InstaCal asks for nothing beyond the download.

UpkeepUpdate frequency

InstaCal ships an update weekly, OneVoice every 4 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 6 level
InstaCal versus OneVoice: the parameters behind the verdict, then further details
ParameterInstaCalOneVoice
Price$19.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews56.6% of reviews—
Number of ratings1 — better—
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
Best chart rank#169 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size113 MB26 MB
Age rating4+4+
DeveloperHigher Bar, LLCGiuseppe Liccardi

In-app purchases

None

InstaCal

No in-app purchases

4 purchases

OneVoice

One-time4
  • Mini$2.99
  • Mini$4.99
  • Medium$9.99
Show 1 more
  • Large$17.99

Questions

Is InstaCal free?
InstaCal costs $19.99, with no in-app purchases.
Is OneVoice free?
OneVoice is free to download, with in-app purchases available.
Do InstaCal or OneVoice have ads?
Neither InstaCal nor OneVoice shows ads.
Which is updated more often, InstaCal or OneVoice?
InstaCal ships an update weekly, and OneVoice every 4 days. Most recently, InstaCal was updated on October 29, 2026 and OneVoice on October 24, 2026.

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