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Jun 24, 2024 β€’ 8 tweets β€’ 3 min read β€’ Read on X
Another day, another "How is this app so big tweet" πŸ€“

This time its the @DJIGlobal iOS app, which comes in at 1 GB Screenshot of tweet of the DJI Mimo app store with the text "New app size recrod"
A lot of the comments speculated that the app was large due to assets & while there are 155 MB of .mp4 video files, the bulk of the size is coming from ML models Pie chart of app size showing 155 MB (15%) are coming from videos
There's 264 MB of .mlmodelc files - these are compile Core ML Models which are designed to run on Apple devices. Some of the biggest models πŸ‘‡

face_feature.mlmodelc - 68.7 MB
inpainting_l2.mlmodelc - 50.8 MB
pet.mlmodelc - 30.5 MB Screenshot showing .mlmodelc files in a treemap
We also see a `` inside `LCTAISDK.bundle` at 83 MB

There's also 25 MB of models w/ a `.mnn` extension, not entirely sure what this is, but found this repo that might be related. Anyone more familiar?
localAiModel.zip
github.com/alibaba/MNN
Screenshot of `localAiModel.zip` node, which has an install size of 83 MB
So how do we get to 1 GB?

Lots of ML files
A ton of videos
~150 MB of dynamic frameworks
110 MB main app target binary

There's about 120 MB of easy savings from Emerge Insights that we're picking up
Screenshot of all dynamic frameworks in the app. Total instal size of dynamic frameworks are 142.4 MB
Screenshot showing three Emerge insights that could save close to 120 MB of size
Here's a brief overview on Core ML
emergetools.com/glossary/core-…
Here's the original tweet πŸ™‚
And finally, here's our example page if you want to dive in
emergetools.com/app/example/io…

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More from @emergetools

May 2
Ok, time for a bit of a rabbit hole

...or should we say... Deere hole 🀦

🧡 Looking through the @JohnDeere apps. (Pepe Silvia warning...iykyk)

p.s. l10n = localization
Some context - we were poking around our localization data and John Deere's "TractorPlus" & "Ops Center" jumped out

🚜 TractorPlus is 412 MB - 115 MB (32%) is l10n

βš™οΈ Ops Center is 276 MB - 114 MB (42%) is l10n

So why did this jump out?
Firstly, apps like FedEx (160 MB l10n) or Garmin Connect (90 MB) inefficiently use localizations

@Tinder recently wrote how they used Emerge to reduce size of l10n by 95%


@Airbnb did a similar optimization - we'll link to a few 🧡s at the bottommedium.com/tinder/how-the…
Read 13 tweets
Apr 14
ask and you shall receive 🫑

🧡 figuring out why @telepass is almost half a GB Image
For those who are unfamiliar with it, Telepass is an electronic toll collection system used primarily in Italy and other parts of Europe. Here's the general breakdown

It's a flutter app πŸͺ½
Total install size - 457 MB
Frameworks - 417 MB 🫨
Main app target - 25 MB Image
91% of install size is due to frameworks, 293 of them to be exact

There are a number of reasons that apps would have so many frameworks, but usually it's to support complex functionality in the app, or to make the app more modular and independent for teams working in parallel
Read 9 tweets
Mar 25
What app has added the most number of dynamic frameworks in the last 3 months?

Hint: it's an old friend of ours πŸ€–
It's @EufyOfficial, who we wrote about a few months ago

They've added a bunch of new frameworks, but its not just that they've added a lot that's interesting, its *what* they've been adding πŸ‘€ Image
Of the new frameworks, they've added~20 RN frameworks and a handful of Flutter frameworks

Not ideal to keep adding both RN & Flutter πŸ€” Image
Image
Read 7 tweets
Mar 24
When we tweet about RN apps that have room for improvement, we often used the General Motor apps as an example

WELL NO MORE πŸ‘πŸ‘πŸ‘

🧡 How General Motors shrunk app size by ~70% Image
We wrote a deep dive on the four GM apps roughly a year ago

In it, we detailed how they could reduce EACH app by ~200 MB
The apps went above that, reducing app size by ~300 MB

The main optimization came from renivubg TardisHybridContainer, which is where the vast majority of bloat came from in each app. Basically this was a mess of a dynamic framework w/ inefficient assets + a large jsbundle
Read 7 tweets
Mar 18
What's truly wild here is that at the beginning of 2024, the T-Life app was 37.3 MB

It's now at 475 MB

🧡 How to 10x your app size Image
Image
General breakdown

Dynamic Frameworks: 195 MB
Main app binary: 159 MB
Asset catalog: 69 MB

fwiw, each of those are bigger than the entire app was ~14 months ago πŸ•΅ Image
basically this is what T-Life did over the last year

The app used to have a few UI & Games bundles + a slim binary and that was it

Now it's largest dynamic framework (AzureCommunicationCalling) is bigger than the entire app used to be at 65 MB
Read 9 tweets
Feb 6
Got a few requests for this!

Let's break down the @binance crypto app πŸ’° Image
So there's two versions of the app we're looking at, the US version and another version shipped under "Binance Switzerland"

From what we saw, the US app is only for the US, and every other country gets the app from Binance Switzerland, probably due to different regulations Image
Image
πŸ‡ΊπŸ‡Έ US version weighs in at 303 MB
Main app target - 98 MB
Plugins - 94 MB πŸ‘€ we'll come back to this one
Frameworks - 55 MB Image
Read 16 tweets

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