Spark Read vs Spritz
Spritz works in your browser. Spark Read works everywhere — and remembers what you’ve read.
Feature comparison
| Spark Read | Spritz | |
|---|---|---|
| Product type | Native iOS/Android app + Web app + reading library | Free browser tool that works on any website |
| Native iOS app | Yes | No — browser only |
| Native Android app | Yes | No — browser only |
| Standalone web app | Yes | Yes (browser tool) |
| Import PDFs / EPUBs / Word docs | Yes — PDF, EPUB, DOCX, TXT, MD | No — reads what’s already on the page |
| Personal saved library | Yes, with progress tracking | No — page-by-page |
| ORP / focus-point highlighting | Yes | Yes (this is their core tech) |
| Intelligent sentence pacing | Yes | Yes |
| Offline reading | Yes (PWA + native) | No — requires the open page |
| Library + reading-position sync across devices | Yes — start on phone, finish on laptop | No |
| Sign in with Apple | Yes | No accounts |
| AI document condensing | Yes — Claude, GPT, Gemini, Grok, DeepSeek (Pro/Lifetime) | No |
| Native share-sheet intake | Yes (iOS + Android) | No |
| Reading analytics & streaks | Yes, with CSV export (Pro/Lifetime) | No |
| Price | Free, $3.99/mo, or $44.99 lifetime | Free |
Pricing comparison
Free tier
Subscription
Lifetime
Full reader, all formats, 5 cloud documents
$3.99/mo or $29.99/yr (Pro — 50 cloud docs, AI condensing, CSV export)
$44.99 one-time (unlimited cloud + all future features)
Free, full browser tool
Not offered
Not offered
Where Spark Read pulls ahead
A real library, not just an in-page reader
Spritz reads what’s on the page in front of you. Spark Read remembers everything you import — PDFs, EPUBs, Word docs, articles — across sessions, with reading position and progress saved automatically.
Bring any document, anywhere
Drop a PDF, EPUB, DOCX, Markdown file, or paste a URL — plus the iOS/Android share sheet. Everything parses on your device. Spritz only reads text already loaded in your browser.
Cross-device sync that actually follows you
Native iOS, native Android, and a fully-functional Web app — with cloud sync that keeps your library, your reading position, and your session history in step across all of them. Spritz is browser-session-only with no library to sync.
AI condensing with the model you trust
Pro and Lifetime users can condense long documents using Claude, GPT, Gemini, Grok, or DeepSeek before reading. Spritz is a pure renderer — no condensing, no summarization.
When Spritz is the right pick
If you mostly read articles in your browser and just want one-click RSVP on any web page — no install, no library, no account — Spritz is genuinely excellent and it’s free. Spark Read is the better pick the moment you want to import your own files, save a reading list, switch devices, or read offline.
Frequently asked
Is Spark Read built on Spritz technology?
No. Spark Read implements its own RSVP renderer with ORP highlighting and sentence-aware pacing. The underlying idea — display words one at a time, aligned to a focus point — is the same as Spritz pioneered, but the code is independent.
Spritz is free — why pay for Spark Read?
Spark Read is also free for the core reader, all import formats, and 5 cloud documents. The Pro and Lifetime tiers add larger cloud storage, AI condensing, and CSV analytics export — features Spritz doesn’t offer at any price. The fundamental difference is that Spark Read is a reading library and Spritz is a per-page browser tool; they solve different problems.
Which one is faster to read with?
Both render at the speeds you set (Spark Read goes from 100 to 1000 WPM). Speed is a function of the technique, not the brand — what differs is everything around the reader: your library, document import, sync, and analytics.
Does Spark Read work offline?
Yes. Documents are stored locally in your browser or on your device, parsed client-side, and read offline. Cloud sync is optional and only used if you sign in. Spritz requires the page to be open in your browser.
Read everything. Faster.
Free, cross-platform, no account required. Try Spark Read in the browser or install the mobile app.