Emerge Tools Profile picture
Nov 11, 2024 8 tweets 3 min read Read on X
We've got to stop meeting like this 😅

🧵 taking a look under the hood of the @Yelp iOS app Image
Install size weighs in at ~318 MB, but ~4 MB of that is the watch app ⌚️

High-level breakdown:

130 MB dynamic frameworks
47 MB assets
34 MB main app target binary
26 MB localizations

For reference, @GoogleMaps weighs in at ~296 MB (7% smaller) Image
Emerge found 245 images that could be optimized to help save 21 MB (~7%)

We found two nearly identical images of this woman with her dog — one with a vignette and one without. Are both images used in the app? Only Yelp could answer that 🕵️ Image
We discovered a bunch of these category.coredata.sqlite files in the app which happen to be localized databases of every business category on Yelp

Some of the business categories include squash, sex therapy, feng shui, and parasailing. Nice 🤭 Image
Another fun thing we found were these Lottie json animations for various milestones you achieve, like to recognize that you're a hot dog expert 🌭🏅
Aside from that, we didn't find much else except that another 44 MB could be saved by stripping binary symbols (😎 classic @jazzychad) Image
Thanks for tagging us @SwiftDev_UI @singhalrishi27! We love doing these 🕺

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More from @emergetools

Jan 16
Customer: “Why is this app so big?”

Company: “Very cool features & lots of them + you have no way to check what I’m saying”

Not today corporate. Not today.

🧵 Why @ouraring is ~450 MB Image
This might be a bit long, so TL;DR

Oura is just duplicating a bunch of images, json, & localizations. The size isn’t b/c it’s “powerful with many features”

Here’s what the size actually is 👇

Assets: 207.8 MB
Localizations: 49.2 MB
JSON: 35.5 MB
Audio: 26.5 MB Image
The Oura app is mostly different bundles:

OuraImages (90.4 MB): Images
OuraComputeModels (26.1 MB): PyTorch models
Insights (16 MB): JSON files to score “sleep”, “readiness”, etc.
OuraLocalizations (12 MB): Localizations
OuraIcons (9 MB): Icons Image
Read 9 tweets
Jan 7
In 2024, @DraftKings decreased app size by 65% and improved app launch by +50%

Let’s take a look at what they did

🔬 Migrating from Xamarin → Native Image
The main app binary went from 97 MB → 11 MB (the project also changed its name from DK.Gaming.iOS → Sportsbook)

Aside from that, much of the size decrease came from completely removing all dynamic-link libraries (.dll, used in Xamarin projects) Image
We measured a 65% improvement in the native build vs. the Xamarin build (Xamarin) to didFinishLaunching

When we look at the base flamechart, you can see a significant amount of the runtime is from Mono functions

Mono is the C#/.NET runtime used by Xamarin and it’s now completely goneImage
Read 6 tweets
Dec 17, 2024
We got tagged to analyze this app on Thre*ds so we're posting it here too 🤭

🧵 Let's take a look at why the @intesasanpaolo iOS app is 699 MB 😳 Image
A quick breakdown 👇

448 MB (64%) dynamic frameworks 🫠
72 MB (10%) main app target
74 MB (11%) of assets Image
We first found some low-hanging fruit improvements to optimize install size, including

102 MB (15%) from stripping binary symbols
27 MB (4%) from optimizing images
10 MB (1.5%) from removing duplicates

That's 139 MB (20%) of size that could be easily reduced right there 🧠 Image
Read 7 tweets
Oct 3, 2024
Did someone say app size?!

Here's why @thetrainline iOS app is so big 🧵 Image
Total install size is 342 MB

Basic breakdown:

115 MB of Plugins
109 MB main app target binary
34 MB sqlite file 👀 (more on this later)
23 MB Dynamic Frameworks

The rest is assets, localizations, misc. Let's start with the Plugins 🔌 Image
115 MB for two app extensions is a lot 🫨

We see two Plugins that look almost identical (58 MB vs. 57 MB) with many of the same modules in each.

They can likely use a Dynamic Framework to share code between these two app extensions to help reduce total Plugins size Image
Read 9 tweets
Sep 24, 2024
Do you want a paid wallpaper app from @MKBHD?

Maybe not? Well do you want to know how its made 🤓

🧵 Looking inside the new @Panels_art app, starting with ads Image
🎤 Ads have been a big topic

Panels is using Google Ads in both iOS (GAD) & Android

On Android, is the largest dependency in the dex com.google.android.gms.internal.ads

Image
Image
☠️ Looking at it another way, we're monitoring over 16k classes in the entire Android app with Reaper

Of that, 4,172 (25%) of classes are related to Google Ads 😬 Image
Read 11 tweets
Sep 5, 2024
Oohhoho this one looks fun!

Let's take a look at why the @SantanderUK iOS app is at a whopping 613.3 MB and how 35% of it does nothing for the user 🧐 Image
Right off the bat, it looks like most of the app (587.6 MB) is dynamic frameworks

Dylibs let you share code between targets, but are larger than static frameworks b/c static let's the compiler strip dead code. It's likely that Santander doesn't need ALL of those to be dynamically linkedImage
Also, note the "String Tables" in the dynamic frameworks— these are unnecessary binary symbols that can be stripped out and save 215.5 MB (35% of install size) for Santander UK 🤓Image
Image
Read 10 tweets

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