Spark Read vs Spritz
Spritz speed-reads the web pages in front of you. Spark Read keeps a library of your own documents.
Feature comparison
| Spark Read | Spritz | |
|---|---|---|
| Product type | Reading library app for iOS, Android and web | Free apps and extension that speed-read web pages, plus a web PDF reader |
| iOS app | Yes | Yes — free |
| Android app | Yes | Yes — free |
| Web app | Yes — the full reader in any browser | Web PDF reader (pdf.spritz.com) |
| Import PDF / EPUB / Word | Yes — PDF, EPUB, DOCX, TXT, Markdown | PDF through the web reader; its Android listing says it is not an ebook reader |
| Focal-point highlighting | Yes — focal letter (ORP) in red | Yes — Spritz pioneered it |
| Library + reading-position sync | Yes — optional sign-in | No account needed; no sync listed |
| AI document condensing | Yes — Claude, GPT, Gemini, Grok, DeepSeek (Pro/Lifetime) | Not listed |
| Reading analytics & streaks | Yes, with CSV export (Pro/Lifetime) | Not listed |
| Price | Free; Pro $3.99/mo or $29.99/yr; Lifetime $44.99 | 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 — apps, extension and PDF reader
Not offered
Not offered
Spritz details checked on against spritz.com; Spritz on the App Store; Spritz on Google Play. Prices are in US dollars and change often; check before you buy. Spot something out of date? Tell us.
Where Spark Read pulls ahead
Your own documents, not just web pages
Spritz is built around reading web pages. Spark Read imports PDFs, EPUBs, Word docs, Markdown, text and article URLs, keeps them in a library, and remembers where you stopped in each one.
The full reader in a browser
Spark Read’s web app has the same library and reader as the mobile apps, with nothing to install. On the web, Spritz offers a PDF reader; its main experience is the mobile apps and the Safari extension.
Pick up on another device
Sign in if you want to, and your library, reading position and history sync between phone, tablet and browser. Spritz doesn’t list accounts or sync.
AI condensing with the model you trust
Pro and Lifetime users can condense long documents with Claude, GPT, Gemini, Grok or DeepSeek before reading. Spritz doesn’t list a summarising feature.
When Spritz is the right pick
If you mostly read web articles and want a free, no-account way to speed-read them on your phone, Spritz is a good, simple choice, and it costs nothing. Spark Read is the better fit when you read your own files, want one library across devices, or read on a laptop.
Frequently asked
Is Spark Read built on Spritz technology?
No. Spark Read has its own RSVP renderer with focal-letter highlighting and sentence-aware pacing. The idea of showing words one at a time, aligned to a focus point, is the one Spritz popularised, but the code is independent.
Spritz is free — why pay for Spark Read?
You don’t have to. The Spark Read reader, every import format and 5 cloud documents are free. Pro and Lifetime add more cloud storage, AI condensing and CSV export. The real difference is scope: Spark Read is a library for your documents; Spritz is a free way to speed-read web pages.
Which one reads faster?
Both show words at the speed you set; Spark Read runs from 100 to 1000 WPM. How fast you can read with good comprehension depends on you and the text more than the app, and comprehension falls as RSVP speeds rise (Rayner et al., 2016).
Sources: Rayner et al. (2016)
Does Spark Read work offline?
Yes. Documents are parsed and stored on your device, so you can read without a connection. Cloud sync is optional.
Read everything. Faster.
Free, cross-platform, no account required. Try Spark Read in the browser or install the mobile app.