Comparison

Spam Text Blocker & Filter vs PrefixBlock

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

Head to head
About

Spam Text Blocker & Filter

Features
Read full description

Suspicious texts wear you down — fake parcel fees, “your account is locked” alerts, prize bait, endless promos. Blockr filters scam texts from unknown senders, with phishing, promotions and prize bait filtering available with Pro. Turn on Blockr once as your text message filter. From then on, iOS hands texts from unknown senders to Blockr, and junk is moved to your Junk or Promotions folder. Texts from your contacts are never filtered. WHAT BLOCKR DOES • Filters scam texts from unknown senders — free, with no time limit • Checks eligible incoming texts and texts you paste on your iPhone; message content isn't uploaded • Check any text — paste something suspicious and see what Blockr finds • Explains itself — every check comes with a plain-language reason • A setup that fits you — tell Blockr which texts bother you most BLOCKR PRO • Every category: phishing, promotions and prize bait, not just scams • Strict mode for borderline junk • Rules for unknown senders: block and allow lists, number prefixes, email senders, keywords, and silence unknown senders • View up to 500 saved flagged checks (free shows the latest three) The weekly plan includes a 3-day free trial for eligible new subscribers. Yearly subscriptions and a one-time lifetime purchase are also available. After the trial, the weekly subscription renews at the price shown before purchase. Weekly and yearly subscriptions renew automatically unless cancelled at least 24 hours before the trial or billing period ends; manage them in your Apple Account settings. Good to know: Blockr sorts eligible unknown-sender texts into folders; it doesn't delete messages or block calls. Automatic filtering excludes your contacts. Support: https://app.notion.com/p/Support-Blockr-39c0cc7ee736805a9e88c3753f42ea47?source=copy_link Privacy Policy: https://app.notion.com/p/Privacy-Policy-Block-39c0cc7ee736801e9af4c60ca236830e?source=copy_link Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PrefixBlock

Features
Read full description

• 17 languages and 69 countries — block prefixes at home and abroad Chặn Đầu Số identifies and warns you about spam calls and texts by prefix. When a number from a prefix you added calls, the app shows a "Spam" label right on your screen. Other apps only block one number at a time — block this one, they call from the next. Chặn Đầu Số works differently: you block the whole prefix (024899, for example) and the app covers every number starting with it. Spam operations buy numbers in bulk blocks, so blocking by prefix hits them at the source. Key features: • Block calls by landline prefix — 024 (Hanoi), 028 (Ho Chi Minh City) and more • Filter spam SMS from those same prefixes too • Quick-block suggestions for the most common telesales prefixes — one tap • "Warn only" mode — show a label instead of hard-blocking, your choice • Bilingual Vietnamese / English, switch right inside the app Privacy first: • Does NOT read or upload your contacts • NO ads, NO tracking • Your block list stays on your device Free for up to 500,000 numbers. Upgrade to Premium (monthly / yearly / lifetime) to block without limits. Note: iOS handles blocking silently, and it does not block numbers saved in your Contacts. Terms of Use: https://phungdoanh.github.io/term.html Privacy Policy: https://phungdoanh.github.io/privacy_policy.html

Screenshots

Spam Text Blocker & Filter4 screens
PrefixBlock3 screens

Verdict

The call

The clearest difference is update cadence: PrefixBlock at weekly against Spam Text Blocker & Filter's every 3 months. On price, ads, 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. Spam Text Blocker & Filter sells 4 in-app purchases, starting at $2.99 per 7 days and PrefixBlock sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Spam Text Blocker & Filter ships an update every 3 months, PrefixBlock weekly. The most recent releases landed on November 5, 2026 and November 8, 2026 respectively.

Scorecard1 real difference · 5 level
Spam Text Blocker & Filter versus PrefixBlock: the parameters behind the verdict, then further details
ParameterSpam Text Blocker & FilterPrefixBlock
PriceFreeFree
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better17.6
Further details — not scored
Size19 MB4 MB
Age rating+44+
DeveloperMUHAMMET USLUPhung Doanh

In-app purchases

4 purchases

Spam Text Blocker & Filter

Subscriptions2
  • Weekly Pro3 Days trial$2.997 Days
  • Yearly Pro$44.991 Year
One-time2
  • Tip$4.99
  • Lifetime Pro$79.99
3 purchases

PrefixBlock

Subscriptions2
  • Chặn đầu số pro tháng$0.991 Month
  • Chặn đầu số pro năm$4.991 Year
One-time1
  • Chặn đầu số trọn đời$9.99

Questions

Is Spam Text Blocker & Filter free?
Spam Text Blocker & Filter is free to download, with in-app purchases available.
Is PrefixBlock free?
PrefixBlock is free to download, with in-app purchases available.
Do Spam Text Blocker & Filter or PrefixBlock have ads?
Neither Spam Text Blocker & Filter nor PrefixBlock shows ads.
Which is updated more often, Spam Text Blocker & Filter or PrefixBlock?
Spam Text Blocker & Filter ships an update every 3 months, and PrefixBlock weekly. Most recently, Spam Text Blocker & Filter was updated on November 5, 2026 and PrefixBlock on November 8, 2026.

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