Comparison

Stack Influence vs Knock

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

Head to head
About

Stack Influence

Connect with brands for free products and cash back by sharing on social media. This platform offers instant approvals for creators with over 100 followers and provides opportunities for long-term brand partnerships.

Highlights
  • Freebies and cash back deals
  • Affiliate and brand ambassador opportunities
  • Instant approval with 100+ followers
  • Effortless posting and automatic payouts
  • Instant matchmaking with relevant brands
  • Build long-term brand relationships
Features
Read full description

Stack Influence gets you freebies, free samples, cash back deals, discounts, affiliate and brand ambassador opportunities. Simply post on social media in exchange for free stuff. Stop DMing brands and get influencer collabs that come to you. KEY FEATURES: • Stop Waiting for Approvals: You only need +100 followers to get approved within 24 hours! Avoid the wait and uncertainty with other platforms - Stack Influence lets you join UGC campaigns instantly and pays you automatically after you post. • Effortless Process: Download the app, answer a few quick questions and start receiving free stuff. Post your honest feedback on Instagram and get 100% cash back instantly—no delays or hidden fees! • Instant Matchmaking: Get paired with top brands that match your lifestyle and preferences. Whether it’s makeup, skin care, fashion, or home - find freebie deals you love and create long term brand ambassador / affiliate relationships! WHY STACK INFLUENCE? • Top Influencer Community: Join over 100,000 UGC creators and influencers. We’ve paid out over $4M in cash and delivered hundreds of thousands of freebie products. • Simple and Transparent: No partial discounts, no cash back delays, and no ambiguous terms. What you see is what you get—and what you get is free stuff from top brands. • Build Your Brand: Not just a one-time transaction—create lasting brand ambassador and affiliate relationships that grow your social media following and influenster career. 5 STAR REVIEW ON TRUSTPILOT: “I am a content creator on social media - primarily Instagram. I have been promoting products through Stack Influence for 7 months now and have been BLOWN away by how fun and professional they are to work with. They have multiple products you get to pick from. You first have to purchase the item yourself, then there are requirements that must be met to receive your payout. Examples are: you have to show your face with the product, you have to do it within a timeline, you have to include certain hashtags, etc. Once you do all the requirements you “Submit your Post” and they send the money to your PayPal account. I have received every payout!! It’s all very simple and thoroughly explained.” BECOME A STACK INFLUENCER TODAY: Don’t miss out on the opportunity to elevate your influenster potential. Join the leading USA influencer community – download Stack Influence today and start getting freebie deals from the world’s top brands!

About

Knock

Features
Read full description

Remember when you were a kid and you'd just knock on your friend's door and ask if they could play? Knock brings that back. No more sending a group text into the void hoping someone responds. No more feeling weird for asking. No more staying home because you didn't know what was going on or because you didn't want to bother anyone. With Knock, you just put your plans on your calendar — "going fishing," "drinks after work," "comedy show tonight" — and your friends can see it and jump in. Simple as that. No awkward ask. No rejection. Just people getting together. Your calendar glows orange. Your friends' glow purple. See who's free, what's happening, and jump into the fun. When a friend marks themselves as available, knock on their door — a simple ping that says "hey, want to hang?" And when you're free, your friends can knock on yours. No guesswork. Host events with RSVPs so you always know who's coming. You're in control. Choose exactly which friends see your events and your free time. You decide when you want to hang, with whom, and what you choose to attend. Science says loneliness is one of the biggest health crises of our time. Knock is our answer to that. Put down the phone. Get out of the house. Go do something with the people you actually like. Knock. Like we used to.

Screenshots

Stack Influence4 screens
Knock4 screens

Verdict

The call

Stack Influence and Knock are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Stack Influence ships an update monthly, Knock every 6 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

ScorecardNo meaningful differences
Stack Influence versus Knock: the parameters behind the verdict, then further details
ParameterStack InfluenceKnock
PriceFreeFree
Rating4.3 (400 ratings) — better—
Positive reviews78.0% of reviews—
Number of ratings400 — better—
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size43 MB28 MB
Age rating17+4+
DeveloperStack InfluenceNed Murphy

Bugs and requests

Stack Influence

Reported bugs

2 issues
  • Issues with verification code delivery
  • Inconsistent campaign availability

Requested features

3 requests
  • Expand to TikTok platform
  • Offer paid content opportunities
  • Improve campaign selection and availability

Knock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Stack Influence

No in-app purchases

None

Knock

No in-app purchases

Questions

Is Stack Influence free?
Stack Influence is free to download, with no in-app purchases.
Is Knock free?
Knock is free to download, with no in-app purchases.
Do Stack Influence or Knock have ads?
Neither Stack Influence nor Knock shows ads.
Which is updated more often, Stack Influence or Knock?
Stack Influence ships an update monthly, and Knock every 6 weeks. Most recently, Stack Influence was updated on October 27, 2026 and Knock on October 28, 2026.

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