Comparison

Blue Ocean vs PrefixBlock

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

Head to head
About

Blue Ocean

Features
Read full description

Blue Ocean không chỉ là giặt sấy, đó là phong cách sống năng động, tiện nghi và đầy hứng khởi. Chúng tôi tin rằng, khi bạn không còn phải bận tâm về việc giặt giũ, bạn sẽ có thêm thời gian để theo đuổi đam mê, vun đắp tình cảm gia đình, và tận hưởng những khoảnh khắc ý nghĩa trong cuộc sống. Hãy đến với Blue Ocean để trải nghiệm sự khác biệt và khám phá những giá trị mà chúng tôi mang lại. Chúng tôi cam kết sẽ luôn đồng hành cùng bạn trên hành trình kiến tạo cuộc sống thong dong và hạnh phúc.

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

Blue Ocean3 screens
PrefixBlock3 screens

Verdict

The call

The clearest difference is in-app purchases: Blue Ocean at none against PrefixBlock's 3. Blue Ocean also leads on iOS requirement (14.0 vs 17.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PrefixBlock sells 3 in-app purchases, starting at $0.99 per month. Blue Ocean asks for nothing beyond the download.

Scorecard2 real differences · 4 level
Blue Ocean versus PrefixBlock: the parameters behind the verdict, then further details
ParameterBlue OceanPrefixBlock
PriceFreeFree
Update frequency—Weekly
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS14.0 — better17.6
Further details — not scored
Size57 MB4 MB
Age rating4+4+
DeveloperDo Khac ChungPhung Doanh

In-app purchases

None

Blue Ocean

No in-app purchases

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 Blue Ocean free?
Blue Ocean is free to download, with no in-app purchases.
Is PrefixBlock free?
PrefixBlock is free to download, with in-app purchases available.
Do Blue Ocean or PrefixBlock have ads?
Neither Blue Ocean nor PrefixBlock shows ads.

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