Comparison

Prof Billal vs Dafaa

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

Head to head
About

Prof Billal

Features
Read full description

Prof Billal application (Hak elBac) is application for e-learning for Bacalurate students (physics and maths)

About

Dafaa

This app provides physics and chemistry lessons, step-by-step solved exercises, and interactive simulations for Algerian high school students. It covers the curriculum for various streams and prepares students for exams up to the baccalaureate level. Content is original and follows the Algerian school curriculum.

Highlights
  • Step-by-step solved exercises
  • Interactive simulations
  • Clear physics and chemistry lessons
  • Practice tests and term exams
  • Offline functionality
  • Weekly calendar with reminders
Features
Read full description

Notice: Dafaa is not a government app. It is an independent, private app. It does not represent the Algerian Ministry of National Education or any government entity, and it has no link with them. دَفْعَة: دروس التعليم الثانوي دفعة: دروس التعليم الثانوي Dafaa is a free app for high-school students in Algeria: physics and chemistry lessons, exercises solved step by step up to baccalaureate (BAC) level, and interactive simulations, all in one place. Who is it for? • 1st, 2nd and 3rd year of secondary education. • Streams: experimental sciences, mathematics, technical mathematics, and the common core in science and technology. • For tests, term exams and the baccalaureate. Original content, made by us: Every lesson, explanation, solution and simulation in Dafaa is original content, written by the app's developer (Majal) with a small team of teachers. It follows the Algerian school curriculum taught in public high schools: the same units and the same terms you study in class. The app is in Arabic, like the classes. What you'll find in the app: • Clear physics and chemistry lessons, one part at a time, with a summary for every unit. • Exercises solved step by step, from easiest to hardest, up to BAC level. Try first, then reveal the result and the steps. • Units such as: following a chemical reaction over time, mechanics and Newton's laws, work and kinetic energy, potential energy, conductance… with new units opening through the year. • A lab in your pocket: interactive simulations, even offline. • Lesson questions with their answers. • Unlimited practice: five answers in a day add a day to your streak. • From the magazine to the solution: every exercise in our printed revision magazines has a QR code that opens it in the app. • Practice tests and term exams with their solutions. • A weekly calendar with reminders for tests and sessions. • Live sessions and notifications for every new unit. Subjects: • Available now: physical sciences (physics and chemistry), 1st to 3rd year secondary. • Dafaa will cover every high-school subject; mathematics comes next. Why Dafaa? • 100% free, no ads. • No account needed: type your name, pick your year and stream, and start. • Works offline once a unit is downloaded. Dafaa is an independent app made by Majal. Its content is original. It is not a government app and does not represent any government entity.

Screenshots

Prof Billal3 screens
Dafaa4 screens

Verdict

The call

The clearest difference is update cadence: Dafaa at every 2 days against Prof Billal's every 2 weeks. Prof Billal's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.4). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Prof Billal ships an update every 2 weeks, Dafaa every 2 days. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 6 level
Prof Billal versus Dafaa: the parameters behind the verdict, then further details
ParameterProf BillalDafaa
PriceFreeFree
Rating—4.7 (3 ratings) — better
Number of ratings—3 — better
Update frequencyEvery 2 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better16.4
Further details — not scored
Size94 MB79 MB
Age rating4+4+
DeveloperBILLAL YAHIAOUIDahmani Walid

In-app purchases

None

Prof Billal

No in-app purchases

None

Dafaa

No in-app purchases

Questions

Is Prof Billal free?
Prof Billal is free to download, with no in-app purchases.
Is Dafaa free?
Dafaa is free to download, with no in-app purchases.
Do Prof Billal or Dafaa have ads?
Neither Prof Billal nor Dafaa shows ads.
Which is updated more often, Prof Billal or Dafaa?
Prof Billal ships an update every 2 weeks, and Dafaa every 2 days. Most recently, Prof Billal was updated on November 7, 2026 and Dafaa on November 10, 2026.

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