49k installs, 0 ratings: a Saudi guy paid out of pocket to push an "Islamic Duolingo" into Nigeria

An Islamic foundations course app built by a solo Saudi indie developer. Three months after launch it has 49k installs, and this week it climbed into Nigeria's Top Free education chart. It charges nothing, runs no ads, and not one user has rated it. The install curve shows three on-and-off phases: the weeks someone spent money brought in a thousand or two a day, and when spending stopped it dropped back to a few dozen a day. Below: what it is, where the traffic came from, how crowded the niche is, and what you can take from it.

Number 116 on Nigeria's chart

On Nov 3, Darajat: Fun Islamic Learning first appeared on Google Play's Nigeria Education Top Free chart, at #182. By Nov 6 it had climbed to #116. The same week it also held steady between #162 and #196 on Indonesia's Education Top Free chart (Google Play charts, 10-29 to 11-06).

That week its installs rose from 33,608 to 49,479,7 in 15,871 days (Google Play installs, 11-06). Looking back, from Sep 25 to Oct 29 it spent 5 full weeks adding only 6 to 24 installs a day.

Another number doesn't match the buzz: on Play it has 0 ratings and 0 reviews; on the App Store the version has already updated to 1.0.12 (11-05), and its rating count is 0. Searching "darajat app" on TikTok turns up no relevant videos, no one has mentioned it on X in nearly 90 days, and the only results online are the store pages and APK download sites.

The Play page says "10K+ Downloads". That doesn't contradict 49,479: Play only moves to the "50K+" tier at 50k, and it is more than five hundred installs short of that tier.

What it is

The first line of the store page reads "Darajat helps you learn the foundations of Islam through clear, structured lessons and daily review". Darajat is Arabic for "ladder, level", and the last line of the iOS description is "one degree at a time", meaning climbing one step at a time.

It copies Duolingo's approach: a chapter-based course path, learned material that comes back for review later, points and achievements, and offline course downloads. It teaches more than the Quran, covering faith, prayer and other "Islamic foundations". The content is available in 14 languages: Arabic, English, Bengali, Urdu, Indonesian, Punjabi, French, Javanese, Turkish, Hausa, Persian, Russian, Swahili and Malay. The store page also has localized titles per language, such as "Darajat: Belajar Islam Seru" in Indonesian and "Darajat: Uislamu kwa Furaha" in Swahili.

The store page states plainly: "Completely free, with no ads." There are no in-app purchases and no subscriptions. On iOS the developer is listed as Mosab almohanna, an individual, not a company; the privacy policy and content admin backend are both hosted on Replit, and the backend is titled "Darajat Admin". One person plus AI tools, a single backend for content, then translation into 14 languages: the cost is low (inference).

The latest update (Play, 10-25) says: "Fixed course downloads when the old download index couldn't be read; restoring downloads keeps your account and learning progress." This is a product being actively maintained, not one that was uploaded and then left alone.

Where the traffic came from: three surges, all back to zero once they stopped

Laying out its installs since launch (third-party install history, AppstoreSpy; averaged per day within each observation interval):

The three waves add up to about 49k; the days without spending add up to less than 1,000. Word-of-mouth doesn't work this sharply: two weeks up, five weeks down, one more week up, with almost nothing during the pauses. The most likely explanation is paid acquisition: someone opened the budget for a few weeks to buy installs in places like Nigeria and Indonesia, then turned it off once the money ran out (inference, fairly confident; I did not directly see the ad creatives).

A few supporting clues:

• The countries where the surges happened are the large Muslim-majority markets with the cheapest CPI. In Nigeria and Indonesia, the bar for the education free charts is low: a thousand or two installs a day is enough to reach the top 200, and its chart position overlaps exactly with the surge weeks.
• 49k installs and 0 ratings is the typical profile of low-intent paid users. It could also just be that the app has no rating prompt; both explanations are possible.
• The privacy policy says "we do not use advertising or analytics SDKs". If the spending went through Google's app promotion ads, Play's built-in install counts are enough and no SDK is needed, so the two don't conflict.
• It can't be found in either Meta's or Google's ad libraries. Those libraries cover app promotion ads incompletely, so not finding it doesn't mean it wasn't advertised.

Another possibility is concentrated recommendations from mosques, schools or WhatsApp groups, which would also produce waves of installs. But it's hard to explain a precise two-week burst followed by a drop to single digits this way, so I'm less confident in that explanation.

Who paid for it? The product charges nothing and the developer is an individual, so this spend is most likely outreach or charity. Islam has the idea of sadaqah jariyah (ongoing charity): teaching knowledge that keeps being used keeps earning reward. Buying tens of thousands of installs in Nigeria and Indonesia, at education-category prices in those markets, comes to a few thousand dollars (estimate, unverified). He doesn't need it to pay back.

Who it's competing with: a dozen "Duolingo for Islam" apps showed up this year

Darajat isn't the only one who had this idea. In 2026, a batch of apps calling themselves "Duolingo for Islam" appeared almost at once (Google Play installs, 11-06):

In this table, Darajat ranks in the middle-to-low range. Its one real difference is language. Hausa (northern Nigeria, Niger), Swahili (East Africa) and Javanese (Indonesia) are almost unserved by anyone else. English, French, Arabic and Urdu are where everyone is fighting.

Did it actually take off?

Not really. A person with money bought cheap installs in cheap markets. The market didn't pull it up. In the 5 weeks since paid acquisition stopped, store search brought in only a dozen or so installs a day, so the multilingual titles didn't catch much organic traffic. The 0 rating shows that out of 49k people, how many finished the first lesson is invisible from outside.

What it does prove is something else: using AI to translate a course and store page into a dozen-plus languages, then spending a few thousand dollars on Nigeria and Indonesia, can get you 50k installs and a top-200 spot in local education charts. For a charity project that's enough. For someone trying to make money, it's just an expense.

If it were you

Grade C: you can learn something, but following it isn't worth it. Darajat itself has no revenue, no organic installs and no retention evidence. Copying it means copying spend that won't pay back. The "Duolingo for Islam" opportunity is already crowded in English, French and Arabic, with the scholar-backed Revealed and high-volume AyahPath sitting on top.

Who it suits: Muslim developers whose native language, or whose community's language, is Hausa, Swahili or Javanese, who already want to build a religious or charity project and can get funding from mosques, schools or institutions. Or teams that already have a running Islamic learning app and want to expand cheaply into West Africa, East Africa or Indonesia.

Who it doesn't suit: anyone who wants to make money from subscriptions (willingness to pay in Nigeria and Indonesia is an order of magnitude below English markets, and English markets are already AyahPath's and Revealed's turf); anyone without a scholar or institution backing the content, since no one vouches for its accuracy (with religious content, users first ask "who taught this?"); anyone counting on organic store traffic (Darajat ran for five weeks without paid spend and got a dozen installs a day).

How to do it: don't build the 15th "Duolingo for Islam." Build the part nobody has done well: one minority language, done deeply, not 14 languages spread thin. For example, only Hausa. Have a respected local teacher review the content and record the audio, and design lessons around local teaching methods instead of machine-translating from English. Validate retention first: add a rating prompt and study reminders in week one, and see your seven-day retention before spending on ads.

How to get users: start with free channels: local mosques and Islamic schools, WhatsApp and Telegram groups, Hausa- and Swahili-language religious creators on TikTok. Then test one country with a small Google App Campaign budget, copying Darajat's rhythm but concentrating spend around the Ramadan peak (starting early February in 2027), not spreading it out during quiet months.

When to start by: to catch Ramadan, have a working course and a month of retention data by the end of December, then start testing with a small budget in January.

Signs this read is wrong: ① after Darajat stops paid spend, daily installs hold at hundreds a day and the rating climbs. That would mean the organic pull in minority languages is real and worth more than this estimate, so the grade should go up. ② The opposite: if monetized rivals like AyahPath or DeenGo add Hausa or Swahili versions, the open space closes fast. ③ If Darajat adds subscriptions or ads after its next spend wave, that shows these markets can pay, and the math needs redoing.

Data and sources

• Installs and charts: Google Play store page and national education free charts (11-06). Historical install curves from AppstoreSpy, spread evenly across each observation gap.
• Store copy, update notes, localized titles: Google Play English, Indonesian, Swahili, Bengali and Urdu pages (11-06).
• iOS: App Store id6791699113, seller Mosab almohanna, version 1.0.12 (11-05), rating count 0.
• Privacy policy and backend: muslim-guide-lkdf937.replit.app.
• Social and ads: TikTok and X search (11-06), Meta and Google ad libraries, no records found.
• Competitors: Google Play installs (11-06), Jibreel, Taalimi, Sabr official sites.
• Wherever "inferred" or "estimated" appears, it is an inference or estimate. There is no direct evidence for the spend amount or where the money came from.