Robin Karlberg

Building apps focused on user Privacy

@jigsawclient 1,308 X followers robinkarlberg rkt.dev First product launched 2y ago

Total monthly visits: 48.3K; Down33.5%MoMAug 2026All others besides Transfer.zip are <5K
Verified MRR total: $1,400; 2 / 4 products with revenue proof
Products: 4; Since Apr 2024
Latest launch: 3mo ago; UnhiddenNo traffic data yet

100% full-depth creator dossier open: complete product portfolio, 12-month combined traffic & MRR curves, shipping cadence, and timeline events.

Traffic & revenue

Portfolio · Last 12 months

Monthly visits

Verified monthly revenueTransfer.zip revenue feed stopped at 2026-10-11

Products and research metrics
Product	Tagline	Category	Visits · Aug	MoM	Launched	Revenue
Transfer.zipOSStransfer.zipTry the way to send files.	Try the way to send files.	File Storage & Sync	47.4K	Down34.2%	2024-04	$1,400
SponsorAppsponsorapp.ioReward your supporters for donating to you - it's like BuyMeACoffee, but smarter.	Reward your supporters for donating to you - it's like BuyMeACoffee, but smarter.	Invoicing & Payments	<5K	Prev <5K	2024-12	$0
Megadeskgetmegadesk.comCustomer support built for founders that ship.	Customer support built for founders that ship.	Helpdesk & Ticketing	<5K	Prev <5K	2026-03	Undisclosed
Unhiddenunhidden.soEvidence-backed SEO to rank your page higher.	Evidence-backed SEO to rank your page higher.	SEO Tools	—	—	2026-08	Undisclosed

Launches, marketing, revenue milestones, and pricing/plan/positioning changes across products

Nov 7 · 8d ago
- SponsorApp disclosed MRR $100Claimed revenue
  Public Disclosure
Nov 1 · 14d ago
- Transfer.zip Homepage headline (H1) changed to “Try the ethical way to send files.”Positioning
  Send Big Files Without Limits→Try the ethical way to send files.
- Transfer.zip Adopted technology: CloudflareFeatures
  —→Cloudflare
- Transfer.zip Adopted technology: TurbopackFeatures
  —→Turbopack
Sep 29 · 47d ago
- Transfer.zip disclosed 30d Revenue $1,100Verified revenue
  Verified Payment Feed