Comparison

Similar Basic vs Ari Helper

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

Head to head
About

Similar Basic

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*Secure Offline PDF, Document Extract & Compare & Export - Ad-Free* Google's Gemini AI as a collaborative assistant. Similar Basic lets you quickly compare PDF or text files and clipboard content without uploading anything online. Your documents stay local using our built-in PDF processor. Special updates: •Deep PDF & Office Extraction: Go beyond simple text. Our built-in engine locally extracts content from PDF, Word, Excel, and PowerPoint files. Your documents are never uploaded. Key Features: * Compare two files (PDF or text). * Compare text pasted from the clipboard. * Offline PDF Processing: Securely extract text on your device. * Upgrade via In-App Purchase: Unlock multi-clipboard storage with save & edit capabilities. * Compare Docx: Direct compare Docx content. * Compare Xlsx: Direct compare Xlsx content. * Compare Pptx: Direct compare Pptx content. * All-New, Multi-Threaded PDF Engine. * Parallel Extraction for Maximum Performance. * Unmatched Accuracy and Reliability. * Export the Extracted File (limited to 100K bytes). Looking for more? Check out "Similar Plus" for advanced features. Terms of Use: [Standard Apple Terms of Use (EULA)] (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)

About

Ari Helper

This AI assistant operates entirely offline, prioritizing user privacy by not collecting personal data. It integrates with Siri for hands-free activation and offers text-to-speech capabilities. Users can manage conversations, download custom models, and even interact with self-hosted or cloud-based AI services.

Highlights
  • Offline AI operation
  • Siri and App Intents integration
  • Privacy-focused, no data collection
  • Text-to-Speech with voice options
  • Conversation history sync via iCloud
  • Downloadable custom AI models
  • Code syntax highlighting
Features
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Introducing Ari - Your Easy-to-Use AI Assistant! Meet Ari, your personal AI assistant, right on your device! Ari runs its models on the device itself, so it works entirely offline — no internet connection required. Your privacy is our priority – Ari doesn't collect any of your personal data. Start Ari anywhere with Siri and App Intents — just say "Ask Ari," speak your question, and hear the answer back. Power users get a full Shortcuts catalog: Ask Ari with any model (Apple Intelligence, local, or cloud), start chats, generate and edit images, analyze PDFs, speak replies, change settings, queue Code Session tasks on Mac, and dispatch prompts to other devices — all chainable in Shortcuts. Ari is on your wrist too: the Apple Watch app remote-controls Ari on iPhone. Dictate from the "Ask Ari" complication or Smart Stack, watch answers stream in, hear them spoken, and hand long replies to iPhone. Questions queue when the phone is away; private chats stay off the watch. Conversations show up in Spotlight — including by what's in their images. Ari reads text and objects in chat pictures on-device so you can search for "that screenshot with the receipt". Private media is never indexed. With Sensitive Content Warning on, flagged images blur behind "Show Anyway" (verified adults can opt out). More to love: Text-to-Speech (device voice or Ava); long-press to copy or retry across models; syntax highlighting with one-tap code copy; Previous Chats synced via iCloud. On Apple Intelligence (iOS 26 / macOS 26 and later), Ari uses the on-device foundation model by default — private, no API key, no network. Attach images: on iOS 27 and macOS 27 the model sees them directly; on OS 26 Ari describes them on-device with the Vision framework (text, tables, barcodes, subjects). Prefer full vision models? Pick one from the menu. Download on-device models with a tap. First launch can install Google's Gemma 4 vision model sized to your device. Or paste a model URL. Self-host with Ollama or any OpenAI-compatible server — LM Studio, vLLM, llama.cpp, LiteLLM — by entering its address, or generate images with DrawThings over gRPC. New in Ari 7: Ari makes pictures and films, and repairs the ones you already have. Films is a studio — write a film as a list of shots, render them one at a time, keep the ones that work, and watch the cut come together in a player above the timeline. Pictures get a canvas editor: brush over a crease and heal it, paint a leash or a stranger out of the frame, or treat the whole photograph — repair, denoise, sharpen camera shake, colorize, upscale four times. Every restoration model runs on your device and downloads on first use rather than shipping in the app. Point the camera at something and ask about it. Look at Something sends the frame to whichever model you have selected — on-device, self-hosted or cloud — captions the answer under the picture and speaks it if you like. Talk to it and it listens, answers, then listens again. It sits beside the microphone, and goes on the Lock Screen, Control Center, the Action Button or Siri. Cloud providers with your own keys: OpenAI (GPT-5 family and GPT Image), xAI Grok (4.5 plus Grok Imagine), Anthropic Claude, Google Gemini (plus Imagen and Veo), and AWS Bedrock. Image-capable models accept photos; import text and source files. Cloud use reminds you each provider's privacy policy applies. On Mac, open a Code Session on a project folder with Grok for agentic tools — read, edit, search, git, shell, browser, web, and MCP — so Ari's GUI agent matches a terminal coding agent. Note: For strongest privacy with iCloud sync, enable Advanced Data Protection. Without it, conversations stay limited to your iCloud account but are not fully end-to-end encrypted. Optionally powered by Gemma 4 (HuggingFace) for offline chat and image understanding. Download Ari and keep your AI assistant at your fingertips!

Screenshots

Similar Basic4 screens
Ari Helper4 screens

Verdict

The call

The clearest difference is price: Similar Basic at Free against Ari Helper's $24.99. Similar Basic also leads on iOS requirement (15.0 vs 26.0). Ari Helper's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 3 weeks). On 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

Similar Basic is free to download; Ari Helper costs $24.99 up front. Similar Basic sells 1 one-off in-app purchase. Ari Helper asks for nothing beyond the download.

UpkeepUpdate frequency

Similar Basic ships an update every 3 weeks, Ari Helper weekly. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

Scorecard4 real differences · 6 level
Similar Basic versus Ari Helper: the parameters behind the verdict, then further details
ParameterSimilar BasicAri Helper
PriceFree — better$24.99
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPad, iPod, MaciPhone, iPad, Mac, Apple Watch
Requires iOS15.0 — better26.0
Further details — not scored
Size22 MB88 MB
Age rating4+17+
DeveloperThinkwider CO., LTD.Blaine Miller

In-app purchases

1 purchases

Similar Basic

One-time1
  • Multi-clipboard Storage$13.99
None

Ari Helper

No in-app purchases

Questions

Is Similar Basic free?
Similar Basic is free to download, with in-app purchases available.
Is Ari Helper free?
Ari Helper costs $24.99, with no in-app purchases.
Do Similar Basic or Ari Helper have ads?
Neither Similar Basic nor Ari Helper shows ads.
Which is updated more often, Similar Basic or Ari Helper?
Similar Basic ships an update every 3 weeks, and Ari Helper weekly. Most recently, Similar Basic was updated on October 3, 2026 and Ari Helper on September 28, 2026.

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