Comparison

Smart Call Blocker vs Secret Notes

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

Head to head
About

Smart Call Blocker

Block unwanted calls with surgical precision using pattern matching. Define rules with wildcards to block entire number ranges, offering robust privacy and control over incoming calls. Works offline and at the system level for seamless protection.

Highlights
  • Pattern matching with wildcards
  • Block number ranges
  • System-level blocking via CallKit
  • 100% offline operation
  • Caller ID labels
  • Unlimited blocking rules (Premium)
Features
Read full description

Block unwanted calls with surgical precision using pattern matching. Unlike crowd-sourced blockers, Smart Call Blocker lets YOU define exactly which numbers to block using wildcard patterns. Block entire number ranges with a single rule. FEATURES: • Pattern matching — Use * as a wildcard for any digit • Block number ranges — e.g., 1900****** blocks 1 million 1900xxxxxx numbers in one rule • Background loading — Large blocklists keep loading after you leave the app, with a Live Activity on iOS 26 • SMS spam filter — The same patterns silently move junk texts from unknown senders to the Junk tab • Duplicate cleanup — One-tap removal of patterns already covered by a broader rule • 213 countries — Full E.164 international format support • Rule labels — Name each rule so you remember why you blocked it • System-level blocking — Powered by Apple CallKit PREMIUM: • Up to 7 wildcards per pattern — block a 10-million-number range in one rule (you confirm before saving) • Unlimited blocking rules • Block up to 1 billion numbers in total (free: 6 million); the real limit depends on your device • Access to all 213 countries • 136 pre-built spam templates across 25 countries • Siri Shortcuts and automation • Priority support FREE: • 5 blocking rules • iCloud Sync across all your devices • Block up to 6 million numbers • Single-country lock (your first rule's country) • Pattern matching with up to 6 wildcards (1 million numbers per rule) • Allow list and import/export • Weekly blocking report HOW IT WORKS: 1. Create a pattern using digits and * wildcards 2. Preview matching numbers before blocking 3. Enable the extension in Settings > Apps > Phone > Call Blocking & Identification 4. All matching calls are automatically blocked — no app needed PRIVACY FIRST: • No data collected. No servers. Just your iPhone and your iCloud. • Blocking runs entirely on your device, even offline • Your patterns sync only through your own private iCloud — we never see your numbers • No tracking or analytics • No account required ABOUT OUR TEMPLATES: Smart Call Blocker ships no block list of its own and blocks nothing until you add a rule. Optional templates each cite a public warning (banks, provincial police, national press) and cover at most 1 million numbers per range around a reported prefix. You decide what to block. PATTERN EXAMPLES: • 1900****** — blocks 1 million 1900xxxxxx premium-rate numbers in Vietnam • 028399***** — blocks 100,000 numbers in a Ho Chi Minh City landline range (fixed-line numbers are 11 digits with the leading 0) • 900555**** — blocks 10,000 numbers in one US 1-900 premium-rate exchange Smart Call Blocker works at the system level using Apple's CallKit framework, so calls are blocked before your phone ever rings. PREMIUM PURCHASE OPTIONS • Premium Monthly: $1.99/month, auto-renewing • Premium Yearly: $14.99/year, auto-renewing • Premium Lifetime: $24.99 one-time purchase, not a subscription • Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. • Payment is charged to your Apple ID at confirmation of purchase. • Manage or cancel anytime in App Store settings. Privacy Policy: https://khanhnv3007.github.io/smartcallblocker-privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Secret Notes

Features
Read full description

Secret Notes - SLOX is a minimal, offline notepad that lets you lock your private notes with a PIN code and device biometrics. KEY FEATURES • Quick note creation with title and body • PIN lock (4-6 digits) - stored as a one-way hash, never the original • Optional Face ID / Touch ID unlock • Auto-lock when the app goes to background • 7 languages: English, Korean, Japanese, Chinese (Simplified/Traditional), Spanish, Portuguese • Light and dark themes PRIVACY FIRST • No sign-up, no login • All notes stored locally on your device • No cloud sync, no server communication (apart from ads) • If you forget your PIN, notes cannot be recovered - we cannot reverse the local hash For diaries, ideas, passwords hints, anything you want to keep to yourself - Secret Notes - SLOX.

Screenshots

Smart Call Blocker4 screens
Secret Notes3 screens

Verdict

The call

The clearest difference is in-app purchases: Secret Notes at none against Smart Call Blocker's 3. Secret Notes also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). Smart Call Blocker's advantage is ads (none vs shown). On price 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. Smart Call Blocker sells 3 in-app purchases, starting at $1.99 per month. Secret Notes asks for nothing beyond the download.

Scorecard4 real differences · 5 level
Smart Call Blocker versus Secret Notes: the parameters behind the verdict, then further details
ParameterSmart Call BlockerSecret Notes
PriceFreeFree
Rating3.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 3 days—
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size7 MB24 MB
Age rating4+4+
DeveloperVan Khanh NguyenSEOKWON YANG

In-app purchases

3 purchases

Smart Call Blocker

Subscriptions2
  • Premium Monthly$1.991 Month
  • Premium Yearly$14.991 Year
One-time1
  • Premium Trọn Đời$24.99
None

Secret Notes

No in-app purchases

Questions

Is Smart Call Blocker free?
Smart Call Blocker is free to download, with in-app purchases available.
Is Secret Notes free?
Secret Notes is free to download, with no in-app purchases.
Do Smart Call Blocker or Secret Notes have ads?
Secret Notes shows ads; Smart Call Blocker does not.

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