Comparison

EcoGPT vs InkStack

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

Head to head
About

EcoGPT

This AI assistant helps with writing, learning, planning, and research, offering web search and image creation. It also tracks your positive environmental impact by funding tree planting with every 100 chats.

Highlights
  • AI-powered writing and editing
  • Web search and information retrieval
  • Image generation from prompts
  • Planning for work, school, and life
  • Impact tracking for tree planting
  • Apple Watch integration
Features
Read full description

EcoGPT is an AI assistant for writing, learning, planning, research, web search, image creation, and everyday questions. It is built around a simple idea: powerful AI should be useful and more responsible. Use EcoGPT like the assistant you already expect, with a cleaner interface and impact built in. What you can do: - Write, edit, and brainstorm - Learn new topics and study step by step - Search the web for current information - Create images from prompts - Plan work, school, travel, and daily life - Track your estimated impact as EcoGPT helps fund verified tree planting EcoGPT is free to start. EcoGPT Pro unlocks unlimited chats, faster responses, image generation, web search, memory, and full impact analytics. Every 100 chats helps plant one real tree through EcoGPT's partners. Same useful AI, with a better reason to use it every day. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Sign in to EcoGPT on your paired iPhone once to set up Apple Watch. Then ask questions, see replies, and return to recent conversations from your wrist. After setup, the Watch connects over Wi-Fi or cellular.

About

InkStack

Features
Read full description

Inkstack is the on-device PDF maker for iPhone: write it, say it, or snap it — then save a PDF without uploading your files. CREATE A PDF • Text to PDF — type notes or a letter and export a clean multi-page document • Voice to PDF — dictate, edit the transcript, then save • Image to PDF — photos or camera; each picture becomes a page EDIT WHAT YOU ALREADY HAVE • Merge PDFs into one file • Split a PDF into single pages • Rotate, reorder, or delete the pages you tap • Drag to highlight exact words — not a random box on page one • Sign with your finger • Fill forms and add a watermark • Search text in the document PROTECT & SHARE • Password-protect before you send • Compress for email and WhatsApp • OCR for scans so text is selectable • Print, share, or export pages as images • Saved files live in the Files tab on this iPhone WHY INKSTACK No account. No cloud for your documents. Create from notes, voice, or photos first — then merge, split, sign, and lock. The app is free and supported by labeled ads. Ads never cover buttons or the keyboard. Tools are not locked behind ads. Privacy: https://sites.google.com/view/inkstackprivacypolicy Support: https://sites.google.com/view/instack-sup

Screenshots

EcoGPT4 screens
InkStack4 screens

Verdict

The call

The clearest difference is in-app purchases: InkStack at none against EcoGPT's 10. EcoGPT's advantage is update cadence (weekly vs every 3 weeks) and chart position (#117 vs unranked). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. EcoGPT sells 10 in-app purchases, starting at $5.99 per month. InkStack asks for nothing beyond the download.

UpkeepUpdate frequency

EcoGPT ships an update weekly, InkStack every 3 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 7 level
EcoGPT versus InkStack: the parameters behind the verdict, then further details
ParameterEcoGPTInkStack
PriceFreeFree
Rating4.8 (11K ratings) — better—
Positive reviews77.8% of reviews—
Number of ratings11K — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#117 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.0 — better26.2
Further details — not scored
Size225 MB17 MB
Age rating12+4+
DeveloperEcoGPT IncYogesh Rathod

In-app purchases

10 purchases

EcoGPT

Subscriptions10
  • EcoGPT Monthly Subscription3 Days trial$5.991 Month
  • EcoGPT Monthly Subscription.$7.001 Month
  • EcoGPT Monthly Subscription3 Days trial$9.991 Month
Show 7 more
  • Monthly Subscription7 Days trial$9.991 Month
  • EcoGPT Yearly Subscription.$9.991 Year
  • EcoGPT Monthly Subscription.7 Days trial$10.001 Month
  • EcoGPT Monthly Subscription.$10.001 Month
  • EcoGPT Monthly Subscription.3 Days trial$24.991 Month
  • EcoGPT Yearly Subscription.$29.001 Year
  • EcoGPT Yearly Subscription.7 Days trial$59.991 Year
None

InkStack

No in-app purchases

Questions

Is EcoGPT free?
EcoGPT is free to download, with in-app purchases available.
Is InkStack free?
InkStack is free to download, with no in-app purchases.
Do EcoGPT or InkStack have ads?
Both EcoGPT and InkStack show ads.
Which is updated more often, EcoGPT or InkStack?
EcoGPT ships an update weekly, and InkStack every 3 weeks. Most recently, EcoGPT was updated on November 9, 2026 and InkStack on October 31, 2026.

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