Remember a few years ago when you wrote an essay, put it on your USB drive, and took it to your professor for evaluation, and he said he didn't want it in Doc but in PDF? You can now easily convert the essay to PDF with a PDF converter. However, if you want to change some text in the PDF, you must download a PDF editor to do so. 

As a result, converting PDF files back to Word documents allows you to edit them much more easily. PDF files are affordably the most convenient means to transfer data over different platforms with the assurance of maintaining high-end information quality. 

Everyone knows how inconvenient it is to work with PDFs. It's difficult to edit them, and even when you do, you don't have the right font. Is it possible to save files as PDFs on your phone? No, I don't believe so. You'll often need a laptop or desktop computer just to convert documents or images to PDF. If you don't have these apps, that is.



In today's post, we will present a case study of a PDF converter app, available on two operating systems, including the App Store (iOS) and the Google Play Store (Android). 

App story

This PDF converter app can convert images (jpg, jpeg, png, etc.) to PDF files. With this app, users can convert all kinds of images to PDF, resize images, etc. 

This app has had over 5 million users worldwide since its initial release in 2019. They did not have a large budget, however, because it was the beginning of their promotion program. Furthermore, due to company size constraints, they come across ASO World, a truly professional team with a reasonable price but an efficient app promotion output. If you share our customers' concerns, the ASO World team might be a good fit for your app company.

The app‘s name remains anonymous here to protect the privacy of our customers. To give you a better idea of ​​the app's story we're sharing, we show one of its competitors on the Google Play Store.

App Store Optimization challenge

To increase traffic, our customer hopes to quickly improve the ranking of the most important keywords. Their main founder informed us that they were always looking for app growth marketing experts to assist them in expanding their business.

Working with the ASO World team, they demand that their demands be met within 3 months.



Click "Learn More" to drive your apps & games business with the ASO World app promotion service now.

App Store Optimization solution

When we did our first ASO analysis for this app, we found that it had a lot of room for improvement at the ASO level. Next, we comment on the ASO metadata fields before ASO World implements optimizations.

Keyword optimization

Keyword research is a very useful technique for researching and defining which keywords our potential customers will use to find us (traffic) and we want to be found (difficulty ranking for said keywords). It should be noted that once keywords are defined, it is important to monitor them frequently, review them and repeat keyword research if necessary.

To define this PDF converter app's keywords, we have prepared a list of all keywords related to "pdf", "pdf converter", "pdf converter free", "picture to pdf" and "picture to pdf", their combinations and suggestions as well as the most used keys for the competition Words. From this list, we considered the most relevant keywords at the business level that have high traffic and make sense at the mobile app store search level.

Then we started the Guarantee keywords ranking service. Here is one of our customer's PDF keywords. You can see the very strong stability of our ranking service.

Product page optimization

Once our keyword list is defined, the next step is to formulate the text of the application file. Remember, as we mentioned in the first point, these fields have different weights at the ASO level and are not the same for both operating systems.

Optimization for Apple App Store

In the app name, as the most relevant field, we deal with the most important keywords with the aim of ranking first.
With 30 characters available, we recommend using branded keywords with the three most important keywords.

In the Subtitle, we utilize 30 characters (like App Name) to put other interesting keywords at the traffic level where we didn't put App Name.

The keyword field is 100 characters long and is where we include the most keywords to optimize search ASO in the App Store. In this hidden field (i.e. not visible from the device or the app store itself) we include the most interesting keywords.

In the promotional text, we added a catchy phrase to communicate the purpose and benefits of the app so users know what they're getting from it.


* Grow with our app growth solutions - choose a guaranteed app ranking service for TOP 5 app ranking acquirement, and maximize your app traffic. Or click the "Promote Now" above (to increase app installs service for app visibility).

* What Is the Keyword Guaranteed Ranking Service? What Is the Advantage of It?

Optimization for Google Play

Titles on Google Play are currently 50 characters (before the implementation of the new guidelines, they will be 30 characters), so we used the space to research phrases that define the focus of the app, including the most relevant keywords. As in the App Store, we always recommend working on branding with the keywords we want to target, as the title is the most important field.

For the short description field, we optimized by adding two related keywords at the traffic level, targeting those keywords as well.

Unlike the App Store, the Google Play long description affects ASO because every word that contains this field is indexed by Google.

Google provided 4,000 characters, so what we did was use HTML, bold, and emoji to improve the structure of the current description. In this way, we managed to use almost every character available to prepare a description that allows Google to understand what the app is about and target it with the keywords we defined in our ASO keyword research.

App Store Optimization result

Using the ASO promotion strategy and analyzing the data, we discovered that the expected rapid growth was occurring within the first month.

● In the first month, increase conversion rate by 15.1%;
● Within a month, the game's app store search visibility increased significantly, and overall app downloads increased by 2X.