Comparison

Iris Drive vs SoloPDF

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

Head to head
About

Iris Drive

Features
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Iris Drive is private file sync for devices you control. Create a local profile or link an existing device, then browse synced files through the native Files app. Share selected folders with people you choose, keep encrypted backups, and open Iris apps from one place. Your files and cryptographic keys stay under your control. Iris Drive has no ads, analytics, or tracking.

About

SoloPDF

Features
Read full description

SoloPDF is a clean, fast, fully local PDF reader — no ads, no account, nothing ever uploaded. • Reading: multiple tabs, outline, page thumbnails, full-text search, fit-width/fit-page zoom. Huge files open instantly thanks to on-demand loading. • Highlights become notes: highlight any text and the annotation is saved as a Markdown notes file (.annotations.md) right next to the PDF — open, edit, and version it with any editor (including our SoloMD). solopdf:// links inside the notes jump straight back to the highlighted passage. • Forms: fill AcroForm PDFs (text fields, checkboxes, dropdowns) and save the result. • Export to Markdown: turn a whole PDF into a Markdown document, outline headings included. • Dark mode with smart page inversion for comfortable night reading. • Interface in English, 简体中文, 繁體中文, and 日本語. Everything runs on your device. No network calls, no data collection.

Screenshots

Iris Drive4 screens
SoloPDF4 screens

Verdict

The call

The clearest difference is device support: SoloPDF at 4 against Iris Drive's 2. SoloPDF also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Iris Drive ships an update every 5 weeks, SoloPDF monthly. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 4 level
Iris Drive versus SoloPDF: the parameters behind the verdict, then further details
ParameterIris DriveSoloPDF
PriceFreeFree
Update frequencyEvery 5 weeksMonthly — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.015.0 — better
Further details — not scored
Size89 MB14 MB
Age rating17+4+
DeveloperSirius Business Oy向东 李

In-app purchases

None

Iris Drive

No in-app purchases

None

SoloPDF

No in-app purchases

Questions

Is Iris Drive free?
Iris Drive is free to download, with no in-app purchases.
Is SoloPDF free?
SoloPDF is free to download, with no in-app purchases.
Do Iris Drive or SoloPDF have ads?
Neither Iris Drive nor SoloPDF shows ads.
Which is updated more often, Iris Drive or SoloPDF?
Iris Drive ships an update every 5 weeks, and SoloPDF monthly. Most recently, Iris Drive was updated on September 21, 2026 and SoloPDF on September 24, 2026.

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