Comparison

Bulb Email vs Trelk

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Bulb Email

This email client prioritizes speed and efficiency with a voice-first interface. It automatically categorizes messages, provides daily digests, and allows quick responses by generating draft options from spoken commands. Content snippets can be pre-set for consistent replies.

Highlights
  • Voice-first email responses
  • Automatic email classification
  • Inbox and outbox digests
  • Customizable content snippets
  • Draft sharing for consistency
  • Secure and private
Features
Read full description

Bulb is a fast, smart, and voice-first email client that helps you spend less time on email and respond to emails on-the-go. Features include: - Automatic email classification based on categories you set. - Automatic inbox and outbox digest to stay on top of all your emails at a glance. - Respond to email by uttering a few word to let the app know what and how to respond and just pick from one of three drafts to send. - Set content snippets so that the App will automatically include them in generated drafts based on context. - Share drafts with others for maintaining brand identity consistency. The Bulb team cares deeply about security and privacy, that is why we don't store any information about your inbox or emails in our servers. Log in with your Gmail account and save time on doing emails today!

About

Trelk

Features
Read full description

Trelk is your personal knowledge engine. Save anything you read — articles, research papers, YouTube videos, PDFs, newsletters, documentation — and watch your understanding grow as AI reveals how everything connects. No subscriptions. No cloud dependency. No data lock-in. Buy once, own it forever. HOW IT WORKS Save content from any source: share a link, scan a QR code, import a PDF, or write your own notes in the built-in Markdown editor. Trelk's on-device AI reads, summarizes, and indexes everything locally. As your library grows, Trelk automatically discovers connections between ideas — surfacing relationships you'd never find on your own. YOUR PERSONAL KNOWLEDGE GRAPH Every piece of content becomes a node in your knowledge graph. Trelk maps conceptual links between articles, papers, and notes — visually showing how topics relate across your entire library. Watch isolated readings transform into an interconnected web of understanding. OPEN-SOURCE AI, ON YOUR DEVICE Trelk ships with open-source models from Hugging Face that run entirely on your phone. No API keys, no subscriptions, no data leaving your device. Want more power? Bring your own OpenAI or Anthropic key, or download any GGUF model directly from Hugging Face. ASK YOUR LIBRARY Ask questions and get answers grounded in what you've actually read. Hybrid retrieval — full-text search combined with semantic understanding — finds the most relevant content across your entire library. Every answer includes source citations linking back to your original items. FLASH REVIEW & SPACED REPETITION Knowledge fades without review. Trelk generates flash review questions from your content and uses spaced repetition to help you retain what matters. Track your retention score, review streaks, and topic performance over time. DAILY PULSE Start each day with an AI-generated synthesis of your recent saves — key themes, emerging patterns, and suggested connections. Your Pulse dashboard shows reading activity, content trends, and progress at a glance. COMMUNITY COLLECTIONS Browse curated collections assembled by the Trelk community. Import entire collections with one tap. Create and share your own. Build knowledge together. OPEN FORMATS, ZERO LOCK-IN Your notes are Markdown. Your database is SQLite. Export your entire library as CSV or JSON anytime. Full backup and restore of your database and all downloaded files. Every byte of your data is in a format any tool can read. BUILT FOR PRIVACY All AI processing happens on your device. Your data never leaves your phone. No accounts required. Sync is optional — choose Dropbox, Google Drive, OneDrive, or iCloud on your own terms. WORKS WITH EVERYTHING Save from Safari, Chrome, or any app via the share sheet. Upload PDFs, Word documents, and Markdown files. Supports articles, research papers, YouTube videos, newsletters, documentation, and personal notes. AVAILABLE IN 6 LANGUAGES English, Portuguese, Spanish, French, German, and Italian. Read more. Think deeper. Connect everything.

Screenshots

Bulb Email4 screens
Trelk4 screens

Verdict

The call

The clearest difference is update cadence: Trelk at every 3 days against Bulb Email's every 9 days. Bulb Email's advantage is iOS requirement (13.4 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Bulb Email ships an update every 9 days, Trelk every 3 days. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Bulb Email versus Trelk: the parameters behind the verdict, then further details
ParameterBulb EmailTrelk
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 9 daysEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.4 — better15.1
Further details — not scored
Size28 MB43 MB
Age rating4+4+
DeveloperPathlit, Inc.Nuno Fonseca

In-app purchases

None

Bulb Email

No in-app purchases

None

Trelk

No in-app purchases

Questions

Is Bulb Email free?
Bulb Email is free to download, with no in-app purchases.
Is Trelk free?
Trelk is free to download, with no in-app purchases.
Do Bulb Email or Trelk have ads?
Neither Bulb Email nor Trelk shows ads.
Which is updated more often, Bulb Email or Trelk?
Bulb Email ships an update every 9 days, and Trelk every 3 days. Most recently, Bulb Email was updated on October 7, 2026 and Trelk on October 25, 2026.

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