The weights and per-app scores are below. If owning open-format files matters more than catalogue size, re-weight format flexibility and Kobo wins instead of Kindle.
Smarter Ranking scored six ebook reading apps against a published 100-point Service Score. Most readers end up using two — a paid store plus a free library app — and the rubric reflects that. We weight catalogue and reading experience heaviest.
Quick answer
Kindle scores 89.0/100 and takes first. It has the largest catalogue, strong accessibility (Open Dyslexic and custom fonts), and reliable cross-device reading. The catch is Amazon lock-in. If you want open-format freedom and direct library borrowing on-device, the runner-up — Kobo at 86.8 — is the smarter pick. For free library reading, jump to Libby.
The ranking
| Rank | App | Best for | Pricing model | Service Score |
|---|---|---|---|---|
| 1 | Kindle | Biggest catalogue + accessibility | Per-title / free app | 89.0 |
| 2 | Kobo | Open ePub + library on-device | Per-title / free app | 86.8 |
| 3 | Libby | Free library ebooks & audiobooks | Free (library card) | 85.5 |
| 4 | Apple Books | Apple-ecosystem reading | Per-title / free app | 83.0 |
| 5 | Hoopla | No-waitlist library + comics | Free (library card) | 81.2 |
| 6 | Everand | All-you-can-read subscription | Subscription | 79.4 |
Pricing models verified at each vendor’s page, June 2026.
Methodology
The full rubric. Weights sum to 100. Each app scored 0–100 per criterion; the weighted average is the Service Score.
| Criterion | Weight | What we measured |
|---|---|---|
| Catalogue & availability | 30 | Library size, new-release access, breadth. |
| Reading experience | 25 | Typography, fonts, accessibility, annotation tools. |
| Value & pricing model | 20 | Cost to read what you want (free vs. per-title vs. sub). |
| Format flexibility & ownership | 15 | ePub support, sideloading, DRM, export. |
| Cross-device sync | 10 | Syncing across phone, tablet, e-reader, web. |
| Total | 100 |
Catalogue leads at 30 — you can’t read what isn’t there. Reading experience at 25 reflects that an app is where you spend hours. Format flexibility (15) rewards apps that don’t lock you in. We did not weight brand on its own.
Per-app profiles
1. Kindle — 89.0/100
Free app; books bought per-title from Amazon’s store (the largest catalogue). Excellent accessibility including Open Dyslexic and other custom fonts. Syncs across phones, tablets, Kindle e-readers, and web.
| Criterion | Score | Weight | Contribution |
|---|---|---|---|
| Catalogue & availability | 98 | 30 | 29.4 |
| Reading experience | 92 | 25 | 23.0 |
| Value & pricing model | 80 | 20 | 16.0 |
| Format flexibility & ownership | 64 | 15 | 9.6 |
| Cross-device sync | 100 | 10 | 10.0 |
| Total | 100 | 89.0 |
Trade-off: locked to Amazon’s proprietary format — the lowest format-flexibility score here.
2. Kobo — 86.8/100
Free app; books per-title. Built on open ePub: sideload from other sources, borrow library books via Libby on Kobo hardware, and export annotations to PDF, HTML, Markdown, or plain text.
| Criterion | Score | Weight | Contribution |
|---|---|---|---|
| Catalogue & availability | 88 | 30 | 26.4 |
| Reading experience | 90 | 25 | 22.5 |
| Value & pricing model | 80 | 20 | 16.0 |
| Format flexibility & ownership | 96 | 15 | 14.4 |
| Cross-device sync | 75 | 10 | 7.5 |
| Total | 100 | 86.8 |
Trade-off: catalogue is smaller than Amazon’s, and sync isn’t quite as seamless.
3. Libby — 85.5/100
Free with a library card (OverDrive). Free ebooks and audiobooks, with Kindle-reading support. The budget reader’s essential app.
| Criterion | Score | Weight | Contribution |
|---|---|---|---|
| Catalogue & availability | 82 | 30 | 24.6 |
| Reading experience | 86 | 25 | 21.5 |
| Value & pricing model | 100 | 20 | 20.0 |
| Format flexibility & ownership | 72 | 15 | 10.8 |
| Cross-device sync | 86 | 10 | 8.6 |
| Total | 100 | 85.5 |
Trade-off: popular titles have wait times measured in weeks, and you borrow rather than keep.
4. Apple Books — 83.0/100
Free, pre-installed on iPhone and iPad, with iCloud sync and an ePub-friendly store. Best inside the Apple ecosystem.
| Criterion | Score | Weight | Contribution |
|---|---|---|---|
| Catalogue & availability | 84 | 30 | 25.2 |
| Reading experience | 88 | 25 | 22.0 |
| Value & pricing model | 78 | 20 | 15.6 |
| Format flexibility & ownership | 74 | 15 | 11.1 |
| Cross-device sync | 91 | 10 | 9.1 |
| Total | 100 | 83.0 |
Trade-off: Apple-only — no Android or e-ink hardware support.
5. Hoopla — 81.2/100
Free with a participating library card. No waitlists — titles are always available, subject to a monthly borrow cap — and a strong comics and manga selection.
| Criterion | Score | Weight | Contribution |
|---|---|---|---|
| Catalogue & availability | 80 | 30 | 24.0 |
| Reading experience | 80 | 25 | 20.0 |
| Value & pricing model | 96 | 20 | 19.2 |
| Format flexibility & ownership | 66 | 15 | 9.9 |
| Cross-device sync | 81 | 10 | 8.1 |
| Total | 100 | 81.2 |
Trade-off: monthly borrow caps and a catalogue thinner on big new releases than Libby.
6. Everand — 79.4/100
A subscription “all-you-can-read” service (formerly Scribd) covering ebooks, audiobooks, and documents for a flat monthly fee. Great for volume readers within its catalogue.
| Criterion | Score | Weight | Contribution |
|---|---|---|---|
| Catalogue & availability | 80 | 30 | 24.0 |
| Reading experience | 80 | 25 | 20.0 |
| Value & pricing model | 84 | 20 | 16.8 |
| Format flexibility & ownership | 64 | 15 | 9.6 |
| Cross-device sync | 90 | 10 | 9.0 |
| Total | 100 | 79.4 |
Trade-off: some popular titles are throttled or rotate out, and you keep nothing when you cancel.
How to re-weight
- Budget-only: value to 40%. Libby and Hoopla (free) take the top two.
- Open-format/ownership: format flexibility to 35%. Kobo wins; Kindle drops.
- Apple household: add an ecosystem sub-score. Apple Books climbs.
Verification
- Kindle — largest catalogue, accessibility fonts, ecosystem lock via TWiT Kobo vs Kindle vs Apple Books vs Libby 2026.
- Kobo — open ePub, Libby on-device, annotation export via TWiT 2026 comparison.
- Libby — free with library card, Kindle support via Unstar e-reader apps ranked 2026.
- Apple Books — Apple-ecosystem reading via TWiT 2026 comparison.
- Hoopla — no waitlists, comics, monthly cap via TWiT 2026 comparison.
- Everand — subscription model via PublishDrive best ebook subscription services 2026.
Related rankings
- Best Audiobook Apps (2026): Ranked by Service Score
- Best Action Movies (2026): Ranked by Watch Score
- Best Animated Movies (2026): Ranked by Watch Score
- Best Anime of 2026: Ranked by Watch Score
Frequently asked questions
- How was this weighted?
- A 100-point rubric: 30 catalogue and availability, 25 reading experience, 20 value and pricing model, 15 format flexibility and ownership, 10 cross-device sync. Weights sum to 100; the table is in the methodology.
- Why does Kindle rank #1?
- Kindle has the largest catalogue and excellent accessibility (Open Dyslexic and custom fonts), and reads well across devices. Catalogue (30%) and reading experience (25%) carry 55%, and Kindle leads both. Re-weight format flexibility and Kobo takes first.
- Which app lets me read library books?
- Libby (and Kobo hardware, which supports Libby directly) and Hoopla pull free library titles. Kindle also accepts many library borrows via OverDrive. Apple Books and Kobo are primarily storefronts.
- Which is best for open formats?
- Kobo. It's built on open ePub, accepts sideloaded books, borrows library titles, and exports annotations in multiple formats. That earns it the top format-flexibility score.
- How often is this updated?
- Quarterly, with each subscription/pricing model re-verified at the vendor page before publication.