Comparison

Time Calculator Premium vs Manual Sync

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

Head to head
About

Time Calculator Premium

Easily add and subtract hours and minutes without complex conversions. This app remembers your calculations and allows for large hour amounts, plus decimal conversion. The premium version offers multiplication and division of time values.

Highlights
  • Add and subtract hours/minutes
  • Decimal time conversion
  • Save calculations
  • Multiply/divide time values
  • Ad-free experience
Features
Read full description

Our calculator is designed to help you add and subtract hours and minutes rapidly and without going into complicated conversions. Handy and user friendly, you will be able to see your calculations as you write them down and thus not loosing the thread during long additions. The App keeps all your calculations in memory after closing it. You can calculate up to hundreds of thousands of hours. You can easily convert hours in decimal for instance 2h30 = 2,5 With this Premium version you will also be able to divide and multiply your hours and minutes. The Premium version doesn’t have any adds.

About

Manual Sync

Easily transfer annotations and bookmarks between PDF documents. This tool uses precise matching for professionals who update manuals frequently, ensuring notes stay in place. All processing is done locally for enhanced privacy.

Highlights
  • Smart word-based annotation matching
  • Bookmark hierarchy migration
  • Split-view manual review
  • Local device processing
  • Annual and lifetime subscription options
Features
Read full description

ManualSync: Effortless PDF Revision Assistant Seamlessly transfer your annotations and bookmarks to revised PDF manuals in seconds. Designed for professionals who handle frequent document updates, ManualSync uses high-precision matching to ensure your notes land exactly where they belong. Key Features: Smart word-based annotation matching Bookmark hierarchy migration Split-view manual review Privacy First: All processing happens locally on your device. Your manuals never leave your side. [Subscription Information] • ManualSync Annual Premium: $9.99/year (Includes a 3-day free trial) • ManualSync Lifetime Access: $24.99 (One-time purchase) [Payments and Renewal] • Payment will be charged to your iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Your account will be charged for renewal within 24-hours prior to the end of the current period. • You can manage or turn off auto-renew in your Apple ID Account settings at any time after purchase. • No cancellation of the current subscription is allowed during the active period. • Terms of Use (Standard Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy Policy: https://aerosyncstudio.kr/privacy-manualsync.html

Screenshots

Time Calculator Premium4 screens
Manual Sync3 screens

Verdict

The call

The clearest difference is price: Manual Sync at Free against Time Calculator Premium's $3.99. Manual Sync also leads on update cadence (every 2 days vs every 6 months) and rating (5.0 vs 4.6). Time Calculator Premium's advantage is in-app purchases (none vs 2) and ratings volume (9 vs 1). On 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

Manual Sync is free to download; Time Calculator Premium costs $3.99 up front. Manual Sync sells 2 in-app purchases, starting at $9.99 per year. Time Calculator Premium asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Manual Sync holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Time Calculator Premium has 9 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Time Calculator Premium ships an update every 6 months, Manual Sync every 2 days. The most recent releases landed on October 17, 2026 and October 3, 2026 respectively.

Scorecard8 real differences · 2 level
Time Calculator Premium versus Manual Sync: the parameters behind the verdict, then further details
ParameterTime Calculator PremiumManual Sync
Price$3.99Free — better
Rating4.6 (9 ratings)5.0 (1 ratings) — better
Positive reviews68.8% of reviews—
Number of ratings9 — better1
Update frequencyEvery 6 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.6
Further details — not scored
Size5 MB2 MB
Age rating4+4+
DeveloperAdrien BrecheteauAeroSync Studio

Customer experience

Time Calculator Premium

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews48 reviews
Positive68.8%
Neutral12.5%
Negative18.8%

Manual Sync

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Time Calculator Premium

No in-app purchases

2 purchases

Manual Sync

Subscriptions1
  • ManualSync Annual Premium$9.991 Year
One-time1
  • ManualSync Annual Premium$24.99

Questions

Is Time Calculator Premium free?
Time Calculator Premium costs $3.99, with no in-app purchases.
Is Manual Sync free?
Manual Sync is free to download, with in-app purchases available.
Which has better reviews, Time Calculator Premium or Manual Sync?
Manual Sync is rated higher. Time Calculator Premium averages 4.6 out of 5 from 9 ratings, while Manual Sync averages 5.0 from 1 ratings.
Do Time Calculator Premium or Manual Sync have ads?
Neither Time Calculator Premium nor Manual Sync shows ads.
Which is updated more often, Time Calculator Premium or Manual Sync?
Time Calculator Premium ships an update every 6 months, and Manual Sync every 2 days. Most recently, Time Calculator Premium was updated on October 17, 2026 and Manual Sync on October 3, 2026.

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