Is Letterboxd safe to use?

Letterboxd integrates 45 third-party SDKs spanning advertising, infrastructure, and analytics. Its App Store privacy label declares cross-app tracking via Identifiers and Usage Data. It collects data linked to your identity including Identifiers. It includes 9 advertising or attribution SDKs. Whether this is acceptable depends on your personal privacy preferences.

What permissions does Letterboxd need?

Letterboxd requests 2 iOS permissions: App Tracking Transparency and Camera.

What data does Letterboxd collect?

According to its App Store privacy label, Letterboxd declares cross-app tracking via Identifiers and Usage Data. It collects data linked to your identity including Identifiers. It collects Usage Data and Diagnostics not linked to your identity.

How many SDKs does Letterboxd have?

Letterboxd integrates 45 third-party SDKs. 9 for advertising, 7 for analytics, 1 for crash reporting, 8 for infrastructure, and 19 for other.

Does Letterboxd use App Tracking Transparency?

Yes. Letterboxd requests the App Tracking Transparency permission, which means it asks for your consent to track your activity across other companies' apps and websites.

Does Letterboxd access your camera?

Letterboxd requests access to your camera. The developer says this is for "To upload an avatar image, please allow access to your device’s camera". These permissions are only active when you grant them in iOS Settings.

Does Letterboxd run in the background?

Yes. Letterboxd registers 1 background mode, which means it can perform certain tasks when you're not actively using it.

What are some alternatives to Letterboxd?

Other social networking apps include Yik Yak , 3F , AM , Backbone , BeReal. , and BiP . Each app takes a different approach to social networking and varies in its data collection and SDK usage.

Social Networking · Privacy report

Letterboxd

Free · ★4.8 · Letterboxd

Is Letterboxd safe?

It leans heavily on third-party trackers.

Our take. Letterboxd is built with more third-party tracking code than 87% of the social networking we have scanned, including an analytics SDK from India.

Privacy footprint · vs 97 social networkingHeavy

Trackers from other companies16 · a lot

typical social networking: 4

Data the app links to you1 type · some

typical social networking: 5 · from its own privacy label

What it collects about you

Letterboxd links 1 category of your data to you.

From the developer's own App Store privacy label. These are the kinds of data Letterboxd ties to your identity, and it also declares it shares data to track you across other apps.

Identifiers

Who else is inside

It carries trackers from 4 companies.

Third-party SDKs found in the app, matched to the company that publishes each. Present in the code; we do not observe what they transmit.

🏢Other third partiesadvertising

A third-party SDK.

SDKs

🇺🇸GoogleAnalytics

Firebase, AdMob and Google analytics SDKs, built to record how you use the app and serve ads.

SDKs

🇺🇸AppLovinAdvertising

A mobile advertising and monetization network.

SDK

🇮🇳InMobiAdvertising · India

A mobile advertising network.

SDK

How it compares

Where it sits among social networking.

Every one of these apps we have scanned, on the two measures above: third-party trackers it carries (across) and data it links to you on its own label (up). Toward the top right is more invasive.

Each dot is one social networking app. Letterboxd sits to the right, carrying more third-party tracking than most.

Other signals

Two more flags.

Each is a fact read straight from the app. The same checks run on every app we scan. Only the ones that apply here are shown.

It declares cross-app tracking

Its own App Store label says it tracks you across other companies apps and websites using your advertising identifier.

It sends analytics to a company in India

InMobi is a India company. Its analytics SDK is built into the app.

The evidence

What it's built from.

All 45 SDKs in the app, grouped by what they are for. 16 are third-party trackers.

9advertising

7analytics

1crash reporting

1push & messaging

27standard libraries

16 of the 45 are third-party trackers. One is a push-notification SDK that delivers notifications, rather than tracking you across apps. The rest are the app's own code and standard open-source building blocks.

Show the full SDK list

Other third partiesadvertising

Amazon Publisher Services (DTB) · Google Interactive Media Ads (IMA) · Open Measurement (Ogury) · Open Measurement (PubMatic) · Open Measurement (PubNative) · OpenWrap (PubMatic) · Snap Kit

GoogleAnalytics · USA

Firebase A/B Testing · Firebase Core · Firebase In-App Messaging · Firebase Remote Config · Firebase Remote Config Interop · Firebase Sessions · Google Data Transport

AppLovinAdvertising · USA

AppLovin

InMobiAdvertising · India

InMobi

Push & messaging1 · notifications

Standard libraries27 · on-device

The app's own code plus open-source interface, storage and networking libraries.

How we know this

Counterspy downloads the app from the App Store and statically analyzes its compiled binary. Embedded SDKs are matched against a signature database and resolved to the company that operates each. We also read the developer's App Store privacy label, which lists the data the app says it collects and links to you. We do not run the app or intercept its traffic, so we report capabilities present in the code and the developer's own disclosures, not proven transmission. We assess privacy and data collection, not malware, security flaws, or developer intent. Reports are automated and never edited for payment. Scan v4.10.0, 2026-04-03.

Third-party trackers are advertising, analytics and attribution SDKs detected by static signature matching. Presence shows a capability is compiled in, not that it ran or transmitted data.
"Data the app links to you" is the count of data categories the developer declares as Data Linked To You in its App Store privacy label. Labels are self-reported and not verified by Apple.
Comparison across the 97 social networking in our corpus. Trackers: median 4. Data linked to you: median 5.