Comparison

Duplicate Contacts Manager vs OneVault

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

Head to head
About

Duplicate Contacts Manager

This app helps you clean up your address book by merging and removing duplicate contacts. It offers various options for identifying and resolving duplicates based on identical information, similar names, or phone numbers. You can also back up and restore your contacts for safety.

Highlights
  • Merge duplicate contacts
  • Remove contacts with missing info
  • Backup and restore contacts
  • Identify identical contacts
  • Merge contacts with similar names
  • Merge contacts with similar phone numbers
Features
Read full description

Merge Duplicate Contacts & Remover has following options: 1. Merge & Remove duplicate contacts 2. Delete contacts with no name, number, email. 3. Backup and Restore contacts (in .vcf file) For merging and deleting duplicate contacts following options available: 1. Duplicate Contacts (where all contacts are identical) : Here app deletes duplicate contacts. 2. Similar Phone number (only phone number number in all contacts similar) : Here app merges contacts and make a single contact. 3. Similar Name (name in all contacts are similar) : Here app merges contacts and make a single contact. 4. Inside Duplicates (Same number is stored two times in one contact) : Here app removes other numbers within contact. 5. Duplicate Email (Same email id in all contacts) : Here app merges contacts and make a single contact. Using this app, you can fix your address book easily. Note: Please make sure that you review all duplicates and backup your contacts before merging your contacts.

About

OneVault

Features
Read full description

OneVault keeps everything in your life that happens on a date — and tells you what needs you today. Insurance renewals. Medicine refills. Passport expiry. Property tax. The car service. Your sister's birthday. All of it in one place, sorted so the urgent thing is the biggest thing on screen. WHAT IT DOES Open the app and it answers one question: what needs my attention? Past due items come first and largest. This week next. Then this month, then later. Nothing else competes for your eye. Tap "Mark as done" and OneVault records what happened — the date, the amount, a note, a receipt — then moves the reminder forward one cycle automatically. Weekly, monthly, quarterly, half-yearly or yearly. Your history builds itself. NINE CATEGORIES, THREE GROUPS Recurring — Insurance, Health, Bills & Subs Assets — Gold & Jewelry, Electronics, Vehicles, Property Records — Documents, Dates to Remember Each category has its own fields. Insurance asks for the policy number, cover and nominee. Health asks for dosage and hospital. Documents asks for the issuing authority. You can add your own categories too. NOTES, FOR THINGS WITHOUT DATES WiFi passwords. Blood groups. Locker combinations. Bank login hints. The stuff that never expires but that you can never find. Titles only on the list — no preview line, because these hold passwords. REMINDERS THAT DON'T NAG Two notifications per item: one before it's due, one on the day. Set the lead time per item — 60 days for a passport, 2 for a refill. Never a daily drumbeat on something overdue. WIDGETS Lock Screen and Home Screen widgets show the most urgent item at a glance, in four sizes. PRIVATE BY DESIGN Everything lives on your device and syncs through your own private iCloud account. No servers of ours. No accounts to create. No analytics. No tracking. Nobody sees your passport number, least of all us. Lock the whole app behind Face ID if you like. BUILT FOR IPHONE AND IPAD A focused single column on iPhone; a proper two-column layout on iPad. Full Dark Mode. Text scales with your system size setting. PRICING 30 days free, with everything working. After that, you keep full use of everything you've already added — marking things done, editing, attaching files, reminders, search, all of it. Adding new items needs a one-time purchase. No subscription. Ever.

Screenshots

Duplicate Contacts Manager4 screens
OneVault4 screens

Verdict

The call

The clearest difference is ads: OneVault at none against Duplicate Contacts Manager's shown. OneVault also leads on update cadence (daily vs every 3 weeks). Duplicate Contacts Manager's advantage is iOS requirement (16.0 vs 18.0). On price, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Duplicate Contacts Manager sells 1 one-off in-app purchase and OneVault sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Duplicate Contacts Manager ships an update every 3 weeks, OneVault daily. The most recent releases landed on October 22, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 7 level
Duplicate Contacts Manager versus OneVault: the parameters behind the verdict, then further details
ParameterDuplicate Contacts ManagerOneVault
PriceFreeFree
Rating4.1 (807 ratings) — better—
Positive reviews66.8% of reviews—
Number of ratings807 — better—
Update frequencyEvery 3 weeksDaily — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.0
Further details — not scored
Size8 MB3 MB
Age rating12+4+
DeveloperVimal JainKarthikeyan Sriraman

Bugs and requests

Duplicate Contacts Manager

Reported bugs

3 issues
  • App crashes or freezes during contact processing
  • Merged contacts losing important details like notes and birthdays
  • Incorrect contact information after merging (e.g. wrong phone numbers)

Requested features

4 requests
  • Undo/rollback functionality
  • More granular control over merge/delete options
  • Support for sorting and filtering contacts
  • Backup and restore options for contact data

OneVault

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Duplicate Contacts Manager

One-time1
  • Merger Pro$0.99
1 purchases

OneVault

One-time1
  • OneVault Full Access$2.99

Questions

Is Duplicate Contacts Manager free?
Duplicate Contacts Manager is free to download, with in-app purchases available.
Is OneVault free?
OneVault is free to download, with in-app purchases available.
Do Duplicate Contacts Manager or OneVault have ads?
Duplicate Contacts Manager shows ads; OneVault does not.
Which is updated more often, Duplicate Contacts Manager or OneVault?
Duplicate Contacts Manager ships an update every 3 weeks, and OneVault daily. Most recently, Duplicate Contacts Manager was updated on October 22, 2026 and OneVault on October 14, 2026.

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