PDF Reader vs Sidetone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Reader
Edit, convert, and manage PDF documents on your mobile device. This app allows you to directly edit text, scan documents, fill out forms, and secure your files with passwords and watermarks. It also supports OCR to extract text from scans and convert PDFs to various formats.
- Edit PDF text directly
- Convert PDF to Word, Excel, PPT, images
- OCR for text extraction from scans
- Fill and sign PDF forms
- Secure PDFs with passwords and watermarks
- Annotate PDFs with highlights and notes
- Merge and split PDF files
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KDAN PDF, formerly KDAN PDF Reader, is a mobile PDF editor and reader for iPhone, iPad, and Mac. Edit text directly on your device. Then scan, organize, convert, sign, and share your PDFs in one simple and powerful app. Trusted by millions, KDAN PDF connects your workflow across iPhone, iPad, and Mac, making it easy to review, annotate, and finalize documents anywhere. Who Recommends Us? - Featured as “10 Essentials” in Utility on iTunes - Featured in “10 Best PDF Reader Apps For iPhone & iPad 2019” by FOSSBYTES - Featured as “Best Utility App” in App Store Rewind KEY FEATURES PDF EDITOR • Edit and correct any typos directly on PDFs • Merge multiple files into one PDF • Split a large PDF into several small PDFs • Rotate, delete, add, and rearrange pages • Extract pages or images from PDFs • Change PDF background color PDF CONVERTER • Online & Offline PDF converter • Convert PDF to Word, Excel, PPT & image conversions (docx, xlsx, pptx, jpg, png, gif & bmp). • Save webpages and images as PDFs OCR (Optical Character Recognition) • Recognize and extract text from scans • Export OCR results as text or searchable PDFs • Support 50+ languages SIGN, FORM FILLING, SHARE • Fill out & edit PDF forms • Sign on PDFs • Customize and manage signatures SHARE FILES • Get files from KDAN Cloud, iCloud Drive, Dropbox, OneDrive, Google Drive, Evernote, FTP, or WebDAV client • Compress PDFs • Share flatten PDFs • Send faxes directly from within the app PDF SECURITY • Add passwords to lock PDFs • Remove passwords & restrictions from PDFs • Add & remove PDF watermarks • Validate certificates & signatures in PDF documents VIEW FILES • Supports all mainstream file formats, including Vitrium* PDF format (Like University of Phoenix Ebooks) • Text Reflow & Auto Flow • Present a PDF as a slideshow • View multiple PDFs as tabs • Dark mode supported (only for iOS13 & macOS Mojave and later) • Convert text to spoken audio (text-to-speech) ANNOTATE & REVIEW PDF • Annotate PDFs with highlights, underlines, strikeout text, shapes, sticky notes & text boxes • Add pre-designed stamps, including Approved, Sign Here, Confidential, and more • Add custom stamps with time and date information • Insert hyperlinks to external websites, target pages, and email address • Attach audio notes & insert images to PDFs • Turn handwriting into text with Scribble (Available for iPad) • Add handwritten notes to PDFs MANAGE ANNOTATIONS • Save annotations in XFDF format • Remove all annotations in one tap - Recommended by Techradar, Techworm & Softsonic UPGRADE OPTIONS DOCUMENT 365 • Try for $0.00 for 7 days • Access KDAN PDF on Mac, iPhone, iPad, and other platforms. • Annual plan: billed at USD 59.99/year after the 7-day free trial ends • Quarterly plan: billed at USD 19.99/quarter after 3-day free trial ends • Monthly plan: billed at USD 9.99/month after 3-day free trial ends Subscriptions will be charged to your Apple account upon purchase and will auto-renew 24 hours before the current period ends at the same price and duration. Cancellation during the active period is not allowed. Manage your trial and subscription in your Apple account. Terms of service: https://pdf-reader.kdandoc.com/terms-of-service Privacy Policy: https://pdf-reader.kdandoc.com/privacy-policy Got a question? Contact us at helpdesk@kdanmobile.com or check out https://support.kdanmobile.com
Sidetone
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Sidetone is a Mumble client for iPhone built around listening. Most voice apps give you one room. Sidetone gives you a mix: you join one channel — that sets where your voice goes — and then listen to as many other channels as you like, each with its own level, mute and left/right placement. Dispatch on the left, your own team centred, the wider net low and to the right. You can tell them apart by ear instead of by reading the screen. Talking is deliberate. Talk targets are held, not tapped, so nothing goes out by accident. THE LISTEN MIX • Join one channel, listen to any number of others • Per-channel volume, mute and stereo placement • Mute individual people without leaving the channel • Live level meters show who is speaking HOLD TO TALK • Up to eight talk slots, each aimed at a channel, a person, or everyone you are listening to • Push-to-talk, or voice activity with an adjustable threshold • Double-tap to latch a slot open; tap again to close • Optional haptics and spoken confirmation of the target • The rest of the mix ducks while you speak BUILT TO BE LEFT RUNNING • Live Activity on the lock screen and in the Dynamic Island: server, who is talking, transmit state • Carries on in the background and reconnects by itself, with a tone or a spoken cue when the link drops or returns • Remembers per server: joined channel, listen channels, levels, placement, muted people • Five accent colours, light and dark STANDARDS, NOT A SERVICE • Connects to any Mumble or murmur server — your own, or your team's • TLS control channel, OCB2-encrypted voice, Opus at 48 kHz • A client certificate is generated on your device so servers can register you • No account, no sign-up, no analytics, no third-party SDKs There is no Sidetone server. Your audio goes to the server you choose and nowhere else. You need access to a Mumble server to use Sidetone. Sidetone is an independent client and is not affiliated with or endorsed by the Mumble project; portions of the protocol implementation are derived from Mumble under the BSD 3-clause licence, reproduced in the app under Setup → About.
Screenshots
Verdict
The clearest difference is in-app purchases: Sidetone at none against PDF Reader's 10. Sidetone also leads on update cadence (daily vs every 2 months). PDF Reader's advantage is iOS requirement (13.0 vs 18.0). On price, ads 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. PDF Reader sells 10 in-app purchases, starting at $2.99 per month. Sidetone asks for nothing beyond the download.
PDF Reader ships an update every 2 months, Sidetone daily. The most recent releases landed on October 15, 2026 and September 28, 2026 respectively.
| Parameter | PDF Reader | Sidetone |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (3.5K ratings) — better | — |
| Positive reviews | 80.8% of reviews | — |
| Number of ratings | 3.5K — better | — |
| Update frequency | Every 2 months | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 190 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Kdan Mobile Software LTD | Stephen Markham |
Bugs and requests
PDF Reader
Reported bugs
3 issues- Unable to open or access saved files
- Syncing and backup issues
- Compatibility problems with newer iOS versions
Requested features
4 requests- Improved file management and organization
- Better integration with cloud storage services
- More customization options
- Enhanced accessibility features
Sidetone
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PDF Reader
- KDAN Cloud$2.991 Month
- Deluxe Business Pack$5.991 Month
- Creativity 3653 Days trial$9.991 Month
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- Document 365 (Month)3 Days trial$9.991 Month
- Deluxe PDF Pack for iPhone$12.993 Months
- Creativity 365 - 3 Months3 Days trial$19.993 Months
- Document 365 (Quarter)3 Days trial$19.993 Months
- Deluxe PDF Pack for iPhone$39.991 Year
- Document 3657 Days trial$59.991 Year
- Upgrade to Premium$2.99
Sidetone
No in-app purchases
Questions
Is PDF Reader free?
Is Sidetone free?
Do PDF Reader or Sidetone have ads?
Which is updated more often, PDF Reader or Sidetone?
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