Comparison

Syn vs KyPDF

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

Head to head
About

Syn

This app provides secure control over your cloud-based digital certificate. It ensures that only authorized operations, confirmed by your PIN, can be performed with your certificate. You can also use it to audit your account for security and authorized operations.

Highlights
  • Cloud digital certificate management
  • Exclusive control via mobile app
  • PIN-based authorization
  • Security audits
  • High-security storage (HSM)
  • Operation divergence cancellation
Read full description

O Syngular Autenticador é o app para dispositivos móveis utilizado para garantir o exclusivo controle do seu certificado digital instalado na nuvem. O Syngular Autenticador é a solução Syngular ID para uso de certificação digital na nuvem. Seu certificado digital é gerado e armazenado em equipamentos de alto nível de segurança (HSM - Hardware Security Module), similares aos utilizados por Autoridades Certificadoras para armazenar seus próprios certificados. E o controle exclusivo de utilização do certificado é feito através do Syngular Autenticador. Ao associar seu certificado na nuvem ao seu celular com o Syngular Autenticador, somente operações devidamente autorizadas no seu celular (confirmadas através de PIN) serão realizadas com seu certificado. Qualquer divergência entre o que foi autorizado por você e o que for solicitado, automaticamente cancela a realização da assinatura. Utilize ainda o Syngular Autenticador para realizar auditorias e confirmar, de forma independente, que a sua conta está segura e que somente foram realizadas operações autorizadas pelo seu celular.

About

KyPDF

Features
Read full description

KyPDF is your all-in-one PDF toolkit — right on your iPhone, no cloud, no fuss. Everything happens 100% on your device. No files are uploaded to any server, there's no login, and we collect zero data. Real privacy. CAPTURE & CREATE • Scan documents with the camera • Turn photos into PDF • Create a PDF from text or Markdown CONVERT • PDF to Word, PowerPoint and Excel • Word, PowerPoint and Excel to PDF • HTML to PowerPoint — editable native slides (text, shapes and colors) • PDF to images (PNG/JPG) and searchable PDF (on-device OCR) • PDF/A for archiving EDIT & ORGANIZE • Merge, split, reorder, duplicate and resize pages • Compress to reduce file size • Sign (draw your signature), watermark, header & footer, page numbers, crop • Extract pages and images, 2/4-up and booklet, grayscale PROTECT • Add or remove a password • Redaction — permanently cover sensitive data • Edit or clear metadata READ • Listen to your PDF read aloud (free) WHY KYPDF • 100% offline — your documents never leave the iPhone • No ads, no tracking • Fast, clean, native interface with light/dark mode and Dynamic Type • Broad VoiceOver, Larger Text, Contrast and Reduce Motion support KYPDF PRO The free plan includes 3 uses per week of each tool. Subscribe to KyPDF Pro (monthly) or unlock forever with the lifetime purchase for unlimited use of all current and future tools. The subscription renews automatically and can be canceled anytime in App Store settings; the lifetime purchase is a one-time payment. ——— Terms of Use (EULA): https://devbertini.github.io/kypdf/terms/ Privacy Policy: https://devbertini.github.io/kypdf/privacy/ KyPDF Pro: Monthly (R$ 4.90/month, automatic renewal) or Lifetime (R$ 299, one-time payment). Billing is done through your Apple ID; the subscription renews automatically unless canceled up to 24 hours before the end of the period. Manage or cancel in the App Store settings.

Screenshots

Syn4 screens
KyPDF4 screens

Verdict

The call

The clearest difference is in-app purchases: Syn at none against KyPDF's 2. Syn also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.0). KyPDF's advantage is update cadence (every 4 days vs fortnightly). On price and ads 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. KyPDF sells 2 in-app purchases, starting at $0.99 per month. Syn asks for nothing beyond the download.

UpkeepUpdate frequency

Syn ships an update fortnightly, KyPDF every 4 days. The most recent releases landed on September 30, 2026 and September 7, 2026 respectively.

Scorecard4 real differences · 4 level
Syn versus KyPDF: the parameters behind the verdict, then further details
ParameterSynKyPDF
PriceFreeFree
Positive reviews75.0% of reviews—
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size43 MB4 MB
Age rating4+4+
DeveloperSyngular IDClaudio Bertini Batista

In-app purchases

None

Syn

No in-app purchases

2 purchases

KyPDF

Subscriptions1
  • Month7 Days trial$0.991 Month
One-time1
  • Lifetime$49.99

Questions

Is Syn free?
Syn is free to download, with no in-app purchases.
Is KyPDF free?
KyPDF is free to download, with in-app purchases available.
Do Syn or KyPDF have ads?
Neither Syn nor KyPDF shows ads.
Which is updated more often, Syn or KyPDF?
Syn ships an update fortnightly, and KyPDF every 4 days. Most recently, Syn was updated on September 30, 2026 and KyPDF on September 7, 2026.

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