# Proselens — Readability lens for writers > Readability lens for writers (iPhone/iPad app by Robert Corbin.) - Source: https://appshunter.io/ios/app/proselens/id6776186983 (this page in markdown: same URL + `.md`) - Developer: [Robert Corbin](https://appshunter.io/developer/1890247992) - Category: Productivity, Education - Price: $3.99 - Age rating: 4+ - Requires: iOS 17.0 · 5 MB - Languages: American English - Released: 2026-06-08 - Data updated: 2026-08-12 - User reviews in markdown: https://appshunter.io/ios/app/proselens/id6776186983/reviews.md ## What is Proselens? Proselens is a writing lens that helps you say more with less. Paste or type any text — an email, an essay, a chapter, a cover letter — and Proselens reads it the way a sharp editor would, then marks up the lines worth a second look. Everything happens on your device. No sign-in, no cloud, no tracking. Pay once. No subscription. No in-app purchases. It's yours. A LIVE CLARITY SCORE At the top of the editor sits a single number from 0 to 100. It blends a real readability index with how densely your writing leans on hard sentences, passive voice, adverbs, complex words, and filler. Tighten a line and watch the score climb. It's the fastest feedback loop in your writing. COLOR-CODED HIGHLIGHTS, AS YOU TYPE Proselens paints your text inline, the moment you stop typing: • Very hard sentence — very long or tangled; break it up. • Hard sentence — long or dense; consider splitting it. • Passive voice — "to be" plus a past participle; active voice is clearer. • Adverb — an -ly adverb a stronger verb could replace. • Weasel word — vague qualifiers and filler that add nothing. • Complex word — a long word with a simpler everyday alternative. Tap any highlight, or any chip in the legend, to jump straight to it. Step through every issue from the keyboard bar. Turn off any check you don't care about and the counts and score update instantly. THE NUMBERS THAT MATTER • Flesch Reading Ease and Flesch–Kincaid grade level • Gunning Fog, SMOG, Automated Readability Index, and Coleman-Liau — four additional grade-level indices for a fuller picture • Writing Target — pick an intended audience and compare transparent English-prose estimates with a reference band • Sentence Review — get audience-aware plain-language actions and jump directly to priority sentences • Revision snapshots — compare before/after text and metrics, then restore earlier work safely • Recoverable library — versioned atomic saves, backup recovery, migration, and bounded import/export • Reading time at a speed you set • Words, sentences, paragraphs, and characters • Average words per sentence and syllables per word A clean stats sheet lays it all out, with a plain-English read on what your score means and how to lift it. WORD FREQUENCY Tap "Word Frequency" in the Stats sheet to see which content words you rely on most, ranked by count with frequency bars. A Type-Token Ratio tells you at a glance whether your vocabulary is High, Good, Fair, or Low variety. Stop words, articles, and filler are excluded so only the words that carry meaning show up. SENTENCE LENGTH DISTRIBUTION The Stats sheet includes a visual bar chart showing the length of every sentence in your document, color-coded green, amber, or red by the same hard and very-hard thresholds as the editor. Spot sentence monotony or confirm you have healthy variety at a glance. A LIBRARY FOR YOUR DRAFTS Save what you're working on and come back to it later. Each draft shows its clarity at a glance — including a +/– delta badge that shows how much your score changed since the previous save, so you can see revision progress at a glance. Search across everything. Copy or share the checked text in a tap. PRIVATE BY DESIGN Proselens uses Apple's on-device language tools to do all of its analysis right on your iPhone or iPad. There is no networking in the app at all. Your words never leave your device — not to us, not to anyone. It works fully offline, on every device, with nothing to download. BUILT FOR REAL WRITING • Adjustable thresholds for what counts as a long sentence • Adjustable reading speed for accurate reading-time estimates • Editor text size and an optional monospaced mode for code and scripts • Dark, focused interface designed to keep you in the words • Full Dynamic Type and VoiceOver support Whether you're polishing a newsletter, cutting a report down to size, or just trying to sound like yourself, Proselens is the second pair of eyes that's always with you — and always private. ## Version history (last 5 releases) ### 3.0 — 2026-07-11 Version 3.0 • Review guidance now identifies priority sentences for your selected audience and offers specific plain-language actions grounded in WCAG reading-level principles. • Readability formulas now show their equations, English-language applicability, sample-size limits, and assumptions. Grade output is clearly presented as an estimate, never a diagnosis. • Revision snapshots add before/after text and metric comparisons, with a reviewable history and recoverable restore action. • Document storage is now versioned, atomic, and recoverable. Proselens migrates earlier libraries, keeps a last-known-good backup, reports failures visibly, and supports bounded library import/export. • Long-document analysis remains off the main thread, while the editor now scales with Dynamic Type and improves VoiceOver, hardware-keyboard, Find, and iPad behavior. ### 2.0.1 — 2026-06-25 This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged. ### 2.0 — 2026-06-21 Proselens 2.0 — a pro upgrade for your writing, still 100% offline. • Sticky-sentence & Glue Index: spot sentences weighed down by too many glue words. • Cliché & redundancy detector: ~95 tired phrases highlighted live as you type. • Insights: transitions, sentence-opener variety, rhythm, close repeats/echoes, and per-paragraph pacing. • Writing Goals: per-document word and clarity targets with a live progress banner and a goal-met toast. • PDF report export of your full analysis. Every word is analyzed on your device — no account, no network. ### 1.2 — 2026-06-15 Version 1.1 • Four new readability indices — Gunning Fog, SMOG, Automated Readability Index, and Coleman-Liau now appear alongside Flesch in the Stats sheet, giving you a fuller picture of how your text reads across different measuring systems. • Writing Target — tell Proselens who you're writing for (General public, Grade 6, Everyday reader, Educated adult, High school graduate, or Academic) and the Stats sheet shows whether your grade level is on target, too complex, or too simple for that audience. Change your target any time in Settings. • Simpler alternatives in the Issues list — when a complex word is flagged, the Issues sheet now shows the suggested plain-language replacement right under the word (e.g. "utilize → try 'use'"), so you can act on every flag without leaving the list. • Share analysis report — the Stats sheet and the editor menu both offer "Share analysis report": a clean plain-text summary of every metric, index, and issue count, ready to paste into a document or send to a collaborator. • Word Frequency — tap "Word Frequency" in the Stats sheet to see which content words you rely on most, ranked by count with frequency bars. A Type-Token Ratio tells you at a glance whether your vocabulary is High, Good, Fair, or Low variety. Stop words, articles, and filler are excluded so only the words that carry meaning show up. • Sentence Length Distribution — the Stats sheet now includes a visual bar chart showing the length of every sentence in your document, color-coded green/amber/red by the same hard and very-hard thresholds as the editor. Spot sentence monotony (all bars the same length) or confirm you have healthy variety. • Clarity delta in the Library — each saved document now shows a +/– badge next to its clarity score whenever the score changed since the previous save, so you can see at a glance which drafts are improving. Thanks for using Proselens. Have a note? I read every one. — Robert ### 1.1 — 2026-06-14 Version 1.1 • Four new readability indices — Gunning Fog, SMOG, Automated Readability Index, and Coleman-Liau now appear alongside Flesch in the Stats sheet, giving you a fuller picture of how your text reads across different measuring systems. • Writing Target — tell Proselens who you're writing for (General public, Grade 6, Everyday reader, Educated adult, High school graduate, or Academic) and the Stats sheet shows whether your grade level is on target, too complex, or too simple for that audience. Change your target any time in Settings. • Simpler alternatives in the Issues list — when a complex word is flagged, the Issues sheet now shows the suggested plain-language replacement right under the word (e.g. "utilize → try 'use'"), so you can act on every flag without leaving the list. • Share analysis report — the Stats sheet and the editor menu both offer "Share analysis report": a clean plain-text summary of every metric, index, and issue count, ready to paste into a document or send to a collaborator. Thanks for using Proselens. Have a note? I read every one. — Robert ## More apps by Robert Corbin - [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266) - [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175) - [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447) - [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025) - [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719) - [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879) All apps by Robert Corbin: https://appshunter.io/developer/1890247992 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*