Comparison

Chainkeep vs LockContacts

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

Head to head
About

Chainkeep

This app helps you build and maintain habits with a focus on accurate streak tracking. It offers flexible scheduling, one-tap completion, and insightful statistics to keep you motivated. Enjoy a private, ad-free experience with customizable themes.

Highlights
  • One-tap habit completion
  • Flexible scheduling (daily, weekly, monthly)
  • Accurate streak tracking
  • Habit strength indicator
  • Customizable themes
  • Private, ad-free experience
  • Data export/import
Features
Read full description

Chainkeep is a habit tracker built on two ideas: checking off a habit should take one tap, and your streak should be right. Most habit apps break a "three times a week" habit on the first day you rest. Chainkeep counts it the way you planned it: a week kept is a week kept. Daily habits, specific days, every few days, times per week or per month, and habits you are quitting are all tracked honestly. ONE TAP A DAY • Everything due today on one screen, ticked off in a single tap • Skip a day without breaking anything, or pause a habit for a holiday • Split your day into parts, like morning and evening • Quit habits count your days clean • Hold the app icon to add a habit straight away STREAKS THAT FIT YOUR SCHEDULE • Weekly and monthly targets keep their own streaks • A grace day for the odd miss, if you want one • Habit strength shows how established a habit is, even after a slip • Set a finish line, like 30 or 66 days, and watch it come closer EVERY STAT, FREE • Six months of calendar for every habit • Completion over the last 30 days and the last six months • The days of the week you actually do it, and the time you usually do • Longest runs, totals, and a month in review you can share REMINDERS THAT LEARN • A reminder at the time you choose • Smart nudges learn when you usually do a habit and remind you then YOUR LOOK • 24 colour themes to choose from • Light and dark themes, with a pure black option PRIVATE BY DESIGN • No account, no ads, no tracking • Your habits stay on your own devices • Export and import your data whenever you like CHAINKEEP PRO One payment, yours for good. No subscription. • Unlimited habits (free keeps six) • As many reminders as each habit needs • Archive habits you have finished • Sync between your iPhone and iPad through your own private iCloud Your stats stay free, always. Questions or ideas? Write to hi@noman.codes

About

LockContacts

Features
Read full description

LockContacts is a private contact manager with its own app-only address book, separate from iOS Contacts. Contacts saved in LockContacts are not written to your iPhone address book, so apps that read iOS Contacts cannot see them. Use it for people you want to keep organized without mixing them into your system contacts. What you can do: - Add contacts manually, copy selected entries from iOS Contacts, or import CSV, XLSX, DOCX, PDF, and VCF files - Match file columns so names, phone numbers, emails, companies, and groups go into the right fields - Scan business cards with the camera and save names, phone numbers, and emails - Put one person in multiple groups with nested tags such as #Work/Dev - Pin important people and find anyone quickly - Keep notes and meeting notes with attendees, date, location, and formatted text - Add meetings to iPhone Calendar or export them as .ics files - Get birthday reminders, call, text, email, and open addresses in a map app - Merge duplicate contacts - Lock the app with Face ID or Touch ID after 30 seconds in the background - Turn on iCloud Sync when you want your contacts and meetings in your own iCloud account - Export your data as vCard or CSV LockContacts supports 9 languages: English, Korean, Japanese, Simplified Chinese, Traditional Chinese, German, Spanish, Italian, and Turkish. Free and LockContacts Pro: Use every feature for free with up to 5 contacts and ads. LockContacts Pro is a monthly or annual subscription for unlimited contacts and no ads. The annual plan includes a 2-week free trial. You can cancel your subscription at any time. No sign-up is required. Your data stays on your device, and in your own iCloud account only if you turn on iCloud Sync. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ref979factor.com/locketbook/privacy.html

Screenshots

Chainkeep4 screens
LockContacts4 screens

Verdict

The call

The clearest difference is ads: Chainkeep at none against LockContacts's shown. On price, update cadence, 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. Chainkeep sells 1 one-off in-app purchase and LockContacts sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chainkeep ships an update weekly, LockContacts every 4 days. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

Scorecard1 real difference · 9 level
Chainkeep versus LockContacts: the parameters behind the verdict, then further details
ParameterChainkeepLockContacts
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyWeeklyEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone, Mac — better
Requires iOS16.0 — better17.6
Further details — not scored
Size65 MB146 MB
Age rating4+4+
DeveloperMd Nomanrefactor979 Inc.

In-app purchases

1 purchases

Chainkeep

One-time1
  • Chainkeep Pro$4.99
2 purchases

LockContacts

Subscriptions2
  • LockContacts Pro Monthly$1.991 Month
  • LockContacts Pro Annual14 Days trial$12.991 Year

Questions

Is Chainkeep free?
Chainkeep is free to download, with in-app purchases available.
Is LockContacts free?
LockContacts is free to download, with in-app purchases available.
Do Chainkeep or LockContacts have ads?
LockContacts shows ads; Chainkeep does not.
Which is updated more often, Chainkeep or LockContacts?
Chainkeep ships an update weekly, and LockContacts every 4 days. Most recently, Chainkeep was updated on November 6, 2026 and LockContacts on November 1, 2026.

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