Comparison

Slit vs HeyReader

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

Head to head
About

Slit

Features
Read full description

Read articles faster with RSVP (Rapid Serial Visual Presentation) — a word-by-word speed reading method that eliminates eye movement and keeps you focused. Import articles from any app using the iOS Share extension or paste a URL directly. Slit extracts the article content automatically and presents it one word at a time at 300 words per minute with intelligent pacing that adjusts for word length, punctuation, and reading flow. Key features: - Share extension for one-tap import from Safari and other apps - Smart content extraction that pulls clean article text from web pages - Dynamic pacing for comfortable reading - Automatic progress tracking with resume from where you left off - Full-screen, distraction-free reading experience - Gesture-based controls — tap to play/pause - Offline reading — articles are stored locally on your device - No accounts or subscriptions required

About

HeyReader

This app provides an audio assistant for physical books. Upload the book's PDF, and then ask questions aloud about terms or concepts. The app searches your book and speaks the answers, helping you stay focused on reading.

Highlights
  • Voice-activated questions
  • Answers read aloud
  • Searches book PDF
  • Focuses on physical reading
  • Requires book PDF
Features
Read full description

While reading your physical book, ask HeyReader about any term you don't understand, and it answers aloud. That way your focus stays on the page. Best with Meta Ray-Bans. Any Bluetooth headphones work too. Using HeyReader: 1. Upload PDF 2. Start reading your physical copy 3. Say "Hey Reader" to ask questions and hear answers What you need: 1. Physical book 2. PDF version of the same book 3. Meta Ray-Bans, or any Bluetooth headphones *The assistant searches the book PDF for citation backed answers. New terms in your book send you to ChatGPT or Google on your phone. Every switch over makes it less likely you come back to the reading. (According to Microsoft and UC Irvine researchers, "it takes 23 minutes to resume an interrupted task”.¹) Keep your 23 minutes -- HeyReader searches the book and answers by voice, so your focus stays on the page. Terms of Use: https://tryreader.app/terms Privacy Policy: https://tryreader.app/privacy License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ¹ (Mark et al., CSCW 2015)

Screenshots

Slit4 screens
HeyReader3 screens

Verdict

The call

The clearest difference is in-app purchases: Slit at none against HeyReader's 2. HeyReader's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement 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. HeyReader sells 2 in-app purchases, starting at $6.99 per month. Slit asks for nothing beyond the download.

UpkeepUpdate frequency

Slit ships an update every 2 months, HeyReader weekly. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Slit versus HeyReader: the parameters behind the verdict, then further details
ParameterSlitHeyReader
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS26.226.0 — better
Further details — not scored
Size13 MB36 MB
Age rating4+4+
DeveloperTimur BadretdinovRoshan Gill

In-app purchases

None

Slit

No in-app purchases

2 purchases

HeyReader

Subscriptions2
  • Pro Monthly$6.991 Month
  • Pro Annual$62.991 Year

Questions

Is Slit free?
Slit is free to download, with no in-app purchases.
Is HeyReader free?
HeyReader is free to download, with in-app purchases available.
Do Slit or HeyReader have ads?
Neither Slit nor HeyReader shows ads.
Which is updated more often, Slit or HeyReader?
Slit ships an update every 2 months, and HeyReader weekly. Most recently, Slit was updated on October 13, 2026 and HeyReader on October 25, 2026.

Other comparisons