FlowLock vs PDF Compressor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FlowLock
Enhance your concentration by blocking distracting websites within Safari. Initiate focus sessions to prevent access to social media and video platforms. A special Tunnel Mode allows viewing specific content from blocked sites without enabling further browsing.
- Block distracting websites in Safari
- Initiate focus sessions
- Tunnel Mode for specific content viewing
- Prevent access to social media and video sites
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FlowLock helps you stay focused by blocking distracting websites in Safari. Start a focus session to block YouTube, Instagram, Snapchat and more. If someone sends you a link to a blocked site, FlowLock's unique Tunnel Mode lets you view that specific content without being able to navigate anywhere else — no rabbit holes.
PDF Compressor
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PDF Compressor helps you reduce PDF file size for sharing, uploading, and keeping smaller copies of your documents. Select a PDF, choose a compression level, and check the result before saving or sharing it. Choose your compression level Pick Better Quality, Balanced, or Smaller File to prioritize visual quality or a smaller output. The amount of reduction depends on the original document. Check the result Preview your compressed PDF and see its file size, page count, and percentage reduction. Your original PDF stays unchanged, so you can review the compressed copy before using it. Save, share, and find it again Save the result to Files or send it through the share sheet. Saved results remain available in History for previewing, sharing, renaming, or deleting later. Process your PDFs locally Compression runs locally without uploading your documents to a processing server. No app account is required. Choose the access that fits your needs Free access includes advertising and two successful compressions per day. Cancelled or failed attempts and results without a meaningful size reduction do not use your allowance. Previewing, saving, and sharing an existing result remain available without using another compression. Optional Pro access removes advertising and the daily compression limit. The same compression quality options are available with free and Pro access. Before you compress Compression converts each page into an image within the output PDF. Visual quality may decrease, and text in the compressed copy will no longer be selectable or searchable. Some PDFs may not become smaller, and a specific output size is not guaranteed. PDF Compressor lets you use the app at no cost. However, premium access may be available as an optional in-app upgrade. Privacy Policy: https://alderpathstudio.github.io/PDF-Compressor/privacy-policy.html Terms of Use: https://alderpathstudio.github.io/PDF-Compressor/term-of-use.html
Screenshots
Verdict
The clearest difference is ads: FlowLock at none against PDF Compressor's shown. FlowLock also leads on update cadence (daily vs every 6 days) and iOS requirement (15.0 vs 17.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
FlowLock ships an update daily, PDF Compressor every 6 days. The most recent releases landed on October 10, 2026 and October 26, 2026 respectively.
| Parameter | FlowLock | PDF Compressor |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Daily — better | Every 6 days |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Shaw | Jeny Goentoro |
In-app purchases
FlowLock
No in-app purchases
PDF Compressor
No in-app purchases









