Comparison

Text to Speech vs Ninja AI

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

Head to head
About

Text to Speech

Transform text into lifelike speech with realistic emotion, dialogue, and over 100 studio voices. This app also offers speech-to-text, document reading, voice isolation, and sound effect generation.

Highlights
  • Realistic speech with emotion tags
  • Multi-voice dialogue creation
  • 100+ studio voices in 30+ languages
  • Document reader for PDFs and scanned pages
  • Speech-to-text with speaker labeling
  • AI-powered voice isolation and sound effects
  • Built-in AI for brainstorming and scriptwriting
Read full description

VoiceFlow AI turns your words into lifelike speech with real emotion. Tag a line excited, whispers or laughs, and the voice performs it. Cast several voices in one script and hear them talk to each other. Five audio tools, one app, one balance. EMOTION TAGS Drop a tag into any line and hear the delivery change: excited, whispers, laughs, sighs, curious and many more across emotion, delivery and sound. The v3 model, our most expressive voice, is now open to everyone to try. DIALOGUE MODE Write a script, give each line a speaker, and generate a natural back-and-forth conversation in a single take. Cast up to five voices, each with its own emotion, and follow along with a per-line transcript. Made for podcasts, skits, audiobooks and explainer videos. TEXT TO SPEECH: Words That Sound Alive Choose from 100+ studio voices across 30+ languages and many accents, and pick the model that fits the job: Flash for speed, v2 for lifelike long-form narration, v3 for the most expressive delivery. Words light up as they are spoken, and you can tap any word to jump to it. Translate your text and hear it read fluently in another language. Every take is saved to History, so you never pay twice for the same audio. READER: Listen to Any Document Open a PDF or scan a printed page and listen to it page by page. Each sentence lights up as it is read, and your place is saved for next time. SPEECH TO TEXT: Capture Every Word Record live or import any audio or video file and get fast, accurate transcripts with every speaker labeled. Ask the built-in AI for a summary, or send the transcript to Dialogue and hear it read back in real voices. VOICE ISOLATOR: Pure Voice, No Noise AI strips music, traffic and room noise from any recording, leaving clean, broadcast-ready speech. SOUND EFFECTS: Imagine a Sound, Make It Real Describe any sound, like "rain on a tin roof, distant thunder", and generate it in seconds. ASK AI: Ask Anything, Get Answers Brainstorm ideas, write scripts and solve problems right inside the app, then hear the answer in any voice. MADE FOR CREATORS Export and share your audio for videos, podcasts and presentations, or turn documents, articles and PDFs into engaging listening. Perfect for content creators, students, professionals and accessibility users. FREE EVERY WEEK Every user receives 3,000 free tokens each week, and every tool is open to everyone. No sign-up required to start creating. Audio tools are billed by the second, so a ten-second clip costs ten seconds' worth. IN-APP PURCHASES You can purchase consumables and auto-renewing subscriptions through In-App Purchase. Auto-renewable Subscriptions: • Weekly Premium: ad-free with extra premium tokens • Monthly Premium: ad-free with more renewable premium tokens Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage anytime in your App Store settings. Consumables (One-time Token Purchases): • Small, Medium, and Large Token Packages Purchased tokens never expire and can be used anytime. Privacy Policy: https://voiceflow-ai.com/#/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Ninja AI

This AI assistant offers a dual experience with a chat agent for everyday tasks and an autonomous agent for complex projects. It supports numerous premium AI models for tasks like coding, content creation, research, and website building, boasting high-speed performance.

Highlights
  • Dual AI experience (Chat & Autonomous Agent)
  • Supports 40+ premium AI models
  • Autonomous project execution on its own computer
  • Blazing fast performance (up to 3000 tokens/sec)
  • Website building and deployment
  • Content creation (text, images, video, podcasts)
  • Code generation and debugging
  • File analysis and research
Features
Read full description

Meet Ninja AI, your All In One AI Assistant with 40 Premium Models • Ninja mode for everyday AI tasks • SuperNinja Agent for autonomous projects on its own computer Why Ninja AI • Dual AI Experience: • Ninja Chat Agent powered by GPT 5, Claude Sonnet, Gemini Pro, DeepSeek, Grok • SuperNinja Agent on its own computer for complex work • Blazing Fast Performance: • Up to 3000 tokens per second • Five to ten times faster than competitors • Parallel task execution with no waiting • Every AI Model You Need: • OpenAI GPT 5, GPT 4.1, DALL E 3 • Anthropic Claude 3.7 Sonnet and Haiku • Google Gemini 2.5 Pro and Flash • DeepSeek R1 and V3 • Amazon Nova Pro, Canvas and Reel • Meta Llama 4 Scout and Maverick • Plus FLUX, Mistral, Stable Diffusion and more SuperNinja Agent Capabilities • Build Complete Websites: • Describe your vision and SuperNinja codes and deploys your site with full functionality on its own computer • Create Business Tools: • Generate dashboards, spreadsheets, presentations and documents • Conduct Deep Research: • Get comprehensive reports with citations and insights • Generate Production Ready Code: • From single scripts to full applications Ninja Chat Agent Features • Answer Any Question: • Real time search or deep research on any topic • Write and Create Content: • Generate posts, emails, articles and marketing materials • Create Stunning Visuals: • AI images with DALL E 3, FLUX Pro, Imagen 4 Ultra, Amazon Nova Canvas, Stable Diffusion XL • Generate Videos: • Dazzling videos with Amazon Nova Reel • Turn Text into Podcasts: • One click conversion into high quality audio • Analyze Files: • Upload and analyze text, images, PDFs and reports • Code Generation and Debugging: • Create and debug code in Python, JavaScript, C++ and more • Automate Meeting Scheduling: • Connect Gmail and let Ninja schedule meetings • Built in Editor: • Workspace to create, refine and manage writing or code • Compare Mode: • View results from any two AI models side by side Perfect For • Developers accelerating development cycles • Entrepreneurs conducting market research and creating materials • Students building projects without coding experience • Researchers analyzing and synthesizing information • Content Creators generating multi format outputs • Business Professionals automating workflows Get Started Today • Experience Ninja mode for quick AI tasks and SuperNinja Agent on its own computer for full projects • Download now and transform how you work with AI Web App: https://super.myninja.ai/ Learn More: https://www.ninjatech.ai/ Terms: https://www.ninjatech.ai/terms-of-service

Screenshots

Text to Speech4 screens
Ninja AI4 screens

Verdict

The call

The clearest difference is review sentiment: Text to Speech at 100% against Ninja AI's 55%. Text to Speech also leads on rating (5.0 vs 4.0). Ninja AI's advantage is ads (none vs shown) and ratings volume (53 vs 2). On price, update cadence, in-app purchases and monetization model 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. Text to Speech sells 5 in-app purchases, starting at $4.99 per 7 days and Ninja AI sells 7 in-app purchases, starting at $5.00 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Text to Speech holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Ninja AI has 53 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Text to Speech's written reviews are positive against 55% of Ninja AI's.

UpkeepUpdate frequency

Text to Speech ships an update every 3 weeks, Ninja AI fortnightly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
Text to Speech versus Ninja AI: the parameters behind the verdict, then further details
ParameterText to SpeechNinja AI
PriceFreeFree
Rating5.0 (2 ratings) — better4.0 (53 ratings)
Positive reviews100.0% of reviews — better54.9% of reviews
Number of ratings253 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size46 MB61 MB
Age rating4+12+
DeveloperEmre AcanalNinjatech AI, Inc

Customer experience

Text to Speech

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Ninja AI

All ratings52 ratings
Positive71.2%
Neutral7.7%
Negative21.2%
Written reviews51 reviews
Positive54.9%
Neutral7.8%
Negative37.3%

Bugs and requests

Text to Speech

Not enough reviews yet to summarise bugs or requests.

Ninja AI

Reported bugs

2 issues
  • Crashes and freezes reported
  • Compatibility issues with older devices

Requested features

2 requests
  • Implement delete option for chat history
  • Add Chinese language support

In-app purchases

5 purchases

Text to Speech

Subscriptions2
  • Weekly Premium$4.997 Days
  • Monthly Premium3 Days trial$14.991 Month
One-time3
  • Small Token Pack$3.99
  • Medium Token Pack$7.99
  • Large Token Pack$11.99
7 purchases

Ninja AI

Subscriptions7
  • Standard$5.001 Month
  • Pro$10.001 Month
  • Ultra$15.001 Month
Show 4 more
  • SuperNinja Standard$19.001 Month
  • SuperNinja Pro$29.001 Month
  • SuperNinja Ultra$49.001 Month
  • SuperNinja Max$149.001 Month

Questions

Is Text to Speech free?
Text to Speech is free to download, with in-app purchases available.
Is Ninja AI free?
Ninja AI is free to download, with in-app purchases available.
Which has better reviews, Text to Speech or Ninja AI?
Text to Speech is rated higher. Text to Speech averages 5.0 out of 5 from 2 ratings, while Ninja AI averages 4.0 from 53 ratings.
Do Text to Speech or Ninja AI have ads?
Text to Speech shows ads; Ninja AI does not.
Which is updated more often, Text to Speech or Ninja AI?
Text to Speech ships an update every 3 weeks, and Ninja AI fortnightly. Most recently, Text to Speech was updated on November 4, 2026 and Ninja AI on October 30, 2026.

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