Calki vs DocShelf
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calki
This app combines a powerful camera number scanner, a full-featured unit converter, and a beautifully designed calculator. It allows you to scan numbers from documents, convert units across various categories, and perform calculations with live previews and advanced history.
- Camera number scanner (OCR)
- Unit converter with 12 categories
- Smart calculator with live preview
- Advanced calculation history
- Customizable themes and fonts
- Ad-free experience
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A REFRESHING EVERYDAY CALCULATOR I started this because every calculator I'd ever used felt exactly the same, a grid of grey buttons, technically functional, completely uninspired. You look at this thing dozens of times a day. I figured it might as well feel good to use. DON'T TYPE IT. SCAN IT. The part of daily maths that actually annoyed me wasn't the maths, it was the typing. Squinting at a receipt, a packing slip, a utility bill, trying to get a long string of digits into my phone without fat-fingering a number along the way. So I built real-time number scanning into Calki. Point your camera at any printed digits and they drop straight into your live calculation. No re-typing, no silent typos. SCAN ON AUTOPILOT: OP MODE Even scanning one number at a time felt too slow once you're working through a long list of expenses or measurements, so I added OP Mode. Turn it on and Calki keeps adding (or subtracting, multiplying, whatever operation you need) every number you scan, one after another, as fast as you can point the camera. No tapping the plus sign between items, just point, scan, and watch the total build. TOTAL EDITING FREEDOM I never liked that most calculators punish a tiny mistake by making you start the whole thing over. So in Calki, your equation is never locked in. Made an error three numbers back? Tap it, fix it, or remove it outright. Swap an operator mid-calculation without losing your place. It's your equation, you should be able to touch any part of it. FLUID, CUSTOM CONVERSIONS I got tired of jumping between three different apps just to convert a price, check a weight, and finish the maths. So the converter lives right inside Calki, built for speed: glide between units and categories in a single tap. And if you've got something specific to your own world, you can build a custom unit for it. A HISTORY LOG WITH MUSCLE Nothing winds me up more than digging through a buried menu to find yesterday's calculation. Calki's history stays close and stays useful: double-tap any entry to drop its result back into your current calculation, long-press to pull the entire original expression back onto the board, or add a note so you remember what a number was even for, weeks later. RETRO FLAIR, MODERN SOUL Last one is just personal taste. I don't think calculators need to look clinical and forgettable. Calki's design is inspired by the kind of premium, classic hardware I'd actually want sitting on my desk, and the themes are fully customisable if your taste runs differently from mine. The buttons on the Retro and Industrial themes in particular took a lot of obsessing over. I wanted them to feel like a real high-end device in your hand rather than a flat picture of one, so each was built with realistic animation, haptics, sound, and design to back it up. Thanks for reading this far, and hope you give Calki a try. It's a one-person project, so every download, review, and bit of feedback genuinely reaches me, personally. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
DocShelf
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DocShelf — Documents Simplified Keep every document you own safe, searchable, and beautifully organized — entirely on your device. No cloud upload. No subscription. No ads. Just your files, always with you. WHY DOCSHELF? Most document apps quietly upload your files to a cloud server. DocShelf is different. Everything stays 100% local on your iPhone. Your contracts, medical records, tax returns, and personal scans never leave your device unless you choose to share them. SCAN & CAPTURE Turn your iPhone into a powerful document scanner. Point your camera at any document — receipts, contracts, handwritten notes, business cards, or multi-page reports — and DocShelf captures it instantly. Smart edge detection automatically crops, straightens, and enhances each page so every scan looks sharp and professional. • Multi-page scanning in a single session • Auto edge detection and perspective correction • Contrast enhancement for clear, readable results • Save as PDF or high-resolution image ORGANIZE EVERYTHING No more hunting through a single giant folder. DocShelf gives you a clean, intuitive system to keep every document exactly where it belongs. • Create unlimited folders and subfolders • Tag documents across multiple categories • Full-text search across all your files instantly • Sort by name, date, size, or custom order • Color-code folders for fast visual navigation EVERY FILE TYPE — ONE APP Import from any app on your phone using the system Share Sheet. DocShelf handles them all: • PDFs — view, annotate, and share • Images — JPG, PNG, HEIC from your camera roll • Documents — Word, Excel, PowerPoint, and more • Audio and video files • Any file your iPhone can receive PRIVATE BY DESIGN DocShelf was built from day one with privacy as a core principle — not an afterthought. • 100% offline — no internet connection required, ever • No cloud sync, no remote storage, no server • No analytics, no crash reporting that uploads your data • No third-party advertising SDKs • Full functionality on a plane, underground, or anywhere without signal VIEW & SHARE Read your documents beautifully inside DocShelf without opening another app. When you're ready to share, it's frictionless — AirDrop, Mail, Messages, or any app on your phone. WHO IS DOCSHELF FOR? → Students organizing lecture notes, assignments, and research papers → Professionals managing contracts, invoices, and client documents → Families storing medical records, insurance papers, and important IDs → Freelancers tracking receipts, tax documents, and signed agreements → Anyone who wants a private, always-available digital filing cabinet Download DocShelf and take back control of your documents today.
Screenshots
Verdict
The clearest difference is in-app purchases: DocShelf at none against Calki's 3. DocShelf also leads on ads (none vs shown) and update cadence (every 2 days vs fortnightly). On price and device support 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
Both are free to download. Calki sells 3 in-app purchases, starting at $0.99 per month. DocShelf asks for nothing beyond the download.
Calki ships an update fortnightly, DocShelf every 2 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.
| Parameter | Calki | DocShelf |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (16 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 16 — better | — |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 52 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Vimal Parthan | Sunil Mulgund |
In-app purchases
Calki
- Calki Pro Monthly3 Days trial$0.991 Month
- Calki Pro Yearly7 Days trial$2.991 Year
- Calki Pro Lifetime$5.99
DocShelf
No in-app purchases









