Time Calc vs Contact Groups
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Calc
Easily add, subtract, and compare times with this intuitive calculator. Perfect for logging hours, tracking shifts, or planning projects, it handles hours, minutes, and seconds with precision. Convert results and sync across devices.
- Add, subtract, multiply, divide time
- Calculate time differences
- Add/subtract time from dates
- Convert results to various units
- Convert between decimal and HH:MM:SS
- Save and share calculations
- iCloud sync
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TimeCalc – The Simple and Accurate Time Calculator Need to add, subtract or compare times? TimeCalc makes it easy to calculate hours, minutes, and seconds perfect for logging flight hours, tracking work shifts, or planning projects. With a clean interface and powerful tools, you can: - Perform operations on hours, minutes, and seconds (add, subtract, multiply, divide) - Calculate the difference between two dates or times - Add or subtract time from a specific date - Convert results into years, days, hours, minutes, or seconds - Convert between decimal hours and HH:MM:SS format - Save and share important calculations - Sync operations with iCloud across iPhone, iPad, and Mac Why TimeCalc No more guessing or manual math. TimeCalc is trusted by pilots, professionals, and anyone who works with time on a daily basis. TimeCalc Pro – Free Trial Included Unlock the full power of TimeCalc with a 3-day free trial: - Unlimited time operations - Save and export results - iCloud sync across all devices - Beautiful ad-free experience Choose between weekly or annual subscription plans. Cancel anytime. By the way, AppStore reviews are very helpful to us. If you think Time Calc Pro is worthy, would you mind taking a moment to write a nice review? We'd greatly appreciate it. Thanks for using Time Calc! - If you have a question or need immediate support, please send an email to support@8mobile.org. *** Term of Service *** Users who use the Services offered by TimeCalc declare to know and accept these terms and conditions. The Service is provided by the Owner "as is", without any express or implied warranty for its accuracy or availability. The Owner declines all responsibility in case of errors, inaccessibility of the platform, technical problems related to the service or failure to update the data by the suppliers of the same. All data are for information only and have no legal value. The Owner reserves the right, at any time and without notice, to add, remove features or characteristics or suspend or interrupt the provision of the Service, either temporarily or permanently. The User expressly exonerates and relieves the Owner from any liability, to the extent permitted by the applicable law, in relation to any damage claims of any kind and nature of its own and/or third parties including direct, indirect, punitive, incidental, revenue, loss of data or replacement costs arising from or in any way connected to this agreement. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.8mobile.org/privacy-policy/
Contact Groups
Easily create and manage contact groups directly on your device. Organize frequently contacted people for quick access, send group emails, or text multiple recipients at once. Export contacts as VCards for backup or sharing.
- Create and manage contact groups
- Directly edit Apple Contacts database
- Send group emails
- Send group SMS/text messages
- Export contacts as VCard
- Delete multiple contacts
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"Thanks very much. Very happy. A very useful app." AB, Nov 2020 This app creates and manages Groups in the Apple Contacts app database directly on the iDevice. The groups and their members are stored in the Contacts database. If it is in an iCloud account then iOS manages the synchronisation automatically. The app makes it very easy to create groups of frequently-used contacts eg those people you call frequently without having to search for them in Recents or putting them all in Favourites. All on your iDevice without having to resort to laptops or web-based apps to manage the Contacts that are on your device. The app can display and edit a Contact's details using the same interface as the Apple Contacts app. Contact first name, last name and organisation are checked when searching to filter the contacts in a list - those in the current group or those not in the current group. In the Group list, tap and hold or carefully swipe right to left to change the name of a group. The list of Groups can be sorted alphabetically by using the switch in Settings->Contact Groups. Contact Groups can send an email to all members of a group. Contact Groups can create and add qualifying recipients to an SMS/text message for groups that contain Contacts with a mobile number in the following countries: Australia, New Zealand, United Kingdom, France, Germany, Netherlands, South Africa, Namibia, Zimbabwe, Eswatini, Lesotho, Mozambique and Türkiye. Only numbers prefixed with + and the country code of the above countries and the digits which identify a mobile/cell number for that country are recognised. Canada and the United States of America are not included because there seems to be no way to distinguish a mobile/cell number from a landline phone number. The user can enter the relevant text. The app is not responsible for sending the message nor for any errors that may occur eg if the user does not have the ability to send texts internationally or the mobile number is incorrect etc. Contact Groups can select and delete multiple contacts at the same time - select a group, tap Not In Group, tap Select and then select one or more contacts and tap the trash can that has appeared. A confirmation dialog will appear. A Contact can be added to or removed from Groups: long-press the Contact to show the Groups to which it belongs. Swipe right-to-left to remove it from a Group. Tap Add to Groups to see a list of groups to which the Contact does not belong. Tap a Group to add the Contact to that Group. This can also be achieved by tapping the Contact to display Apple's Contact interface and then scrolling to the bottom to the 'Included in List' section. The Contacts in a Group can be exported via the app as a VCard file for sharing or importing into other machines and devices, or saved to Files or DropBox etc for backup purposes. The app itself does not send any data to any server. Due to Exchange issues, the app is unable to create groups in Exchange/Outlook accounts. SUPPORT If you encounter any issues please use the email link at the bottom of the Help screen or on the Developer Website link on this screen.
Screenshots
Verdict
The clearest difference is price: Time Calc at Free against Contact Groups's $0.99. Time Calc also leads on rating (4.5 vs 3.5) and ratings volume (235 vs 2). Contact Groups's advantage is in-app purchases (none vs 4) and iOS requirement (12.0 vs 18.0). On review sentiment, update cadence, ads and device support 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
Time Calc is free to download; Contact Groups costs $0.99 up front. Time Calc sells 4 in-app purchases, starting at $2.99 per 7 days. Contact Groups asks for nothing beyond the download.
Time Calc holds the better App Store score, 4.5 against 3.5. That said, the two scores are not equally well evidenced: Time Calc has 235 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 42% of Time Calc's written reviews are positive against 40% of Contact Groups's.
Time Calc ships an update monthly, Contact Groups fortnightly. Both last shipped on November 3, 2026.
| Parameter | Time Calc | Contact Groups |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.5 (235 ratings) — better | 3.5 (2 ratings) |
| Positive reviews | 42.4% of reviews — better | 40.0% of reviews |
| Number of ratings | 235 — better | 2 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Ottorino Bruni | Godfrey Raftesath |
Customer experience
Time Calc
Contact Groups
Bugs and requests
Time Calc
Reported bugs
29 issues- Purchase not restoring after device change
- Cannot restore previous purchase
- Pop-up ads are irritating
- Free version doesn't work
- Purchase not restoring
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- Cannot subtract without paying
- Night mode not working
- Seconds function not working
- Display issues after update
- Unable to calculate time passing midnight
- Free version is very limited
- Cannot do 2 calculations without ad
- Pop-up ads interrupt calculations
- Free version is too limited
- Cannot do much without paying
- Only addition in free version
- Paid for app, not usable
- Ads are overwhelming
- Functions don’t work
- Irritating ads
- Unskippable ads
- Basic features locked behind paywall
- App is a scam
- Primitive calculator
- Unusable due to ads
- Subscription for basic calculator
- Deceptive practices
- Expensive subscription
- Customer service is useless
Requested features
5 requests- Ad-free version option
- Option to negate inputting seconds
- Improve restore purchase functionality
- Fix night mode functionality
- Fix display of numbers before action
Contact Groups
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Time Calc
- 1 Week3 Days trial$2.997 Days
- 1 Month$4.991 Month
- 1 Year$11.991 Year
- Forever$29.99
Contact Groups
No in-app purchases
Questions
Is Time Calc free?
Is Contact Groups free?
Which has better reviews, Time Calc or Contact Groups?
Do Time Calc or Contact Groups have ads?
Which is updated more often, Time Calc or Contact Groups?
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