Calculator Pro vs Voicena
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator Pro
This app consolidates essential calculation tools into a user-friendly interface. It offers basic and scientific calculations, currency and unit conversions, loan and discount tools, and a date calculator. Customize themes and settings for a personalized experience.
- Basic and scientific calculations
- Currency and unit converters
- Loan, discount, and tip calculators
- Date and BMI calculators
- Calculation history
- Customizable themes and settings
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Calculator Pro brings essential calculation tools together in one clear and easy-to-use app. Whether you are managing daily expenses, planning a trip, studying, or reviewing your finances, Calculator Pro helps you get accurate results quickly. Features include: • Basic calculator for everyday calculations • Scientific calculator with advanced functions • Currency converter for international spending and travel • Unit converter for length, weight, temperature, volume, speed, time, and more • Loan calculator with monthly payments, total interest, and repayment details • Discount and tip calculators • Date calculator for date differences and future or past dates • BMI calculator with health range guidance • Calculation history for quick reference • Custom themes, accent colors, decimal settings, large text, angle units, and haptic feedback Simple when you need speed. Powerful when you need more. About Subscription: Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Accounts will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. Support: If you have any suggestions or questions, our support team is ready to help. Simply email us at 17791211748@163.com Terms & Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://prefect-calculator.netlify.app/privacy-policy
Voicena
Record your voice, then reverse it to create humorous and surprising audio clips. Challenge friends to guess backward lyrics or sing them correctly, perfect for social media and viral content.
- Record singing
- Reverse audio instantly
- Compare reversed and original voice
- Challenge friends
- Create viral content
- Train hearing and voice
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Ignite the joy of reverse singing The Reverse Singing Challenge, the ultimate app that helps you reverse your singing. Record anything, reverse your voice, ready for funny moments, unexpected skills, and viral fun. * How Reverse Audio works - Record your own singing - Tap Reverse, and hear your voice played backward instantly. - Listen carefully, imitate what you hear. - Reverse your singing from start to finish and compare it with the original voice. - Share your challenge with friends, on social media, or TikTok and see who sings best. * Why you'll love this app - Challenge yourself and your friends: Who can guess the backward lyrics? Who sings it correctly? Create competition and fun. - Create viral moments: Your friends will laugh, be surprised, and they’ll want to try too. Perfect for short videos, stories, and TikTok. - Train your hearing and voice: Practicing reverse singing helps enhance agility, tone, and skills Terms of Use: https://sites.google.com/view/voicena-terms/ Privacy Policy: https://sites.google.com/iwolfsoft.com/voicena/
Screenshots
Verdict
The clearest difference is rating: Calculator Pro at 4.4 against Voicena's 3.6. Calculator Pro also leads on ratings volume (62 vs 5). Voicena's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, update cadence and in-app purchases 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. Calculator Pro sells 2 in-app purchases, starting at $4.99 per 7 days and Voicena sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Calculator Pro holds the better App Store score, 4.4 against 3.6. That said, the two scores are not equally well evidenced: Calculator Pro has 62 ratings behind it against 5, so its average is the more settled of the two.
Calculator Pro ships an update every 2 weeks, Voicena every 3 weeks. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.
| Parameter | Calculator Pro | Voicena |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (62 ratings) — better | 3.6 (5 ratings) |
| Number of ratings | 62 — better | 5 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 15.6 — better |
| Further details — not scored | ||
| Size | 28 MB | 78 MB |
| Age rating | 17+ | 4+ |
| Developer | 嘉晨 王 | Quynh Hoang |
Customer experience
Calculator Pro
Voicena
In-app purchases
Calculator Pro
- Smart Calculator Week7 Days trial$4.997 Days
- Smart Calculator NoAds Lift-Time$12.99
Voicena
- Weekly$3.997 Days
- Monthly$9.991 Month
- Yearly$29.991 Year








