Comparison

Convert by Neutrium vs Whisper

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

Head to head
About

Convert by Neutrium

Features
Read full description

Discover the ultimate unit conversion app, Convert by Neutrium — brought to you by the creators of Neutrium.net, a trusted resource for engineers, scientists, and technical professionals worldwide. With its intuitive interface, Convert by Neutrium is designed to simplify and accelerate your workflow. Whether you’re a seasoned engineer, a student, or someone needing reliable conversions for everyday tasks, Convert by Neutrium ensures speed and precision. Key Features: - Comprehensive Unit Library: Access over 680 units across 40 categories of measures, including length, mass, energy, temperature, pressure, acceleration, density, fuel efficiency and more. - Customizable Favorites: Save frequently used conversions for instant access. - High Accuracy: Built on Neutrium’s trusted conversion engine, ensuring reliable results. - User-Friendly Design: Navigate effortlessly with a clean and modern interface optimised for speed and usability. Download Convert by Neutrium today and transform your unit conversion game.

About

Whisper

Convert spoken words into written text with advanced AI. Transcribe audio recordings, dictate in real-time, and easily edit and share your transcribed content. Boost productivity by saving time on manual transcription.

Highlights
  • Speech to text conversion
  • Transcribe audio recordings
  • Real-time dictation
  • Edit and share text
  • AI-powered accuracy
  • Whispered speech transcription
Features
Read full description

A Speech to Text app is a useful tool that enables you to convert spoken words into written text, making it easier to transcribe voice recordings. With advancements in open AI technology, such apps have become more accurate and efficient, enabling them to transcribe even whispered speech with ease. One of the main advantages of a Speech to Text app is its ability to convert audio recordings into text. This is especially useful for journalists, researchers, and anyone who needs to create written records of meetings, interviews, or other events. The app works by using an audio converter to read the audio file and convert it into text, which can then be edited and shared as needed. In addition to converting voice recordings, a Speech to Text app can also be used for dictation, allowing you to speak directly into the app and have your words transcribed in real-time. This feature can be especially useful for individuals who struggle with writing, or for those who need to create text-based documents quickly and efficiently. Overall, a Speech to Text app is a valuable tool that can save time and improve productivity, making it easier to transcribe voice recordings and create written records of important events. With advancements in open AI technology, these apps are becoming more accurate and reliable, making them an essential tool for anyone who needs to work with audio recordings on a regular basis. --- Payment & Subscription Terms: -Select one of the following purchase options to start using premium features: - Auto-renewable subscription : 1 Week - Per Week ($4.99) - Auto-renewable subscription : 1 Year - Per Year ($29.99) - One-Time Purchase ($99.99) - Payment will be charged to your iTunes account at confirmation of purchase. - Subscriptions will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. - The account will be charged for renewal within 24-hours before the end of the current period, and identify the cost of the renewal. - Your account will be following your plan, within 24 hours before the end of the current period. - You can manage or turn off auto-renew in your Apple ID account settings any time after purchase. - This price is for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. Privacy Policy : https://revoo.studio/privacy-policy.htm Terms of Use : https://revoo.studio/terms-of-service.html

Screenshots

Convert by Neutrium4 screens
Whisper3 screens

Verdict

The call

The clearest difference is update cadence: Whisper at every 3 weeks against Convert by Neutrium's every 13 months. Convert by Neutrium's advantage is iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases 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. Convert by Neutrium sells 1 one-off in-app purchase and Whisper sells 5 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Convert by Neutrium ships an update every 13 months, Whisper every 3 weeks. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.

Scorecard2 real differences · 8 level
Convert by Neutrium versus Whisper: the parameters behind the verdict, then further details
ParameterConvert by NeutriumWhisper
PriceFreeFree
Rating—4.6 (412 ratings) — better
Positive reviews—34.9% of reviews
Number of ratings—412 — better
Update frequencyEvery 13 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better17.0
Further details — not scored
Size16 MB63 MB
Age rating4+4+
DeveloperNative DynamicsRevoo Teknoloji Limited Sirketi

Bugs and requests

Convert by Neutrium

Not enough reviews yet to summarise bugs or requests.

Whisper

Reported bugs

16 issues
  • File import error (widespread and unresolved)
  • AsyncHTTPClient.HTTPClientError
  • Soto core response errors
  • App hangs during processing
  • Processing instance disappears when switching features
Show 11 more
  • Cannot delete records despite delete button
  • Email feedback function non-functional
  • App force quits during transcription
  • Cannot import voice memo files
  • YouTube video transcription non-functional
  • Personal library video transcription fails
  • App stuck in processing loop
  • Low internet connection error despite good connection
  • Recording doesn't work with phone locked
  • Transcription output in wrong language
  • Cannot access app after first use without subscription

Requested features

8 requests
  • Batch processing for multiple files
  • Hotkey support for use in other applications
  • iCloud sync across devices
  • Free trial or freemium model
  • Better language support for Farsi/Persian/Arabic
Show 3 more
  • Ability to delete recordings
  • Preview before purchase
  • In-app FAQ and help documentation

In-app purchases

1 purchases

Convert by Neutrium

One-time1
  • Tip$1.99
5 purchases

Whisper

Subscriptions3
  • Weekly Premium Membership$9.997 Days
  • Monthly Subscription$19.991 Month
  • Yearly Premium Membership$89.991 Year
One-time2
  • Offer for Lifetime Premium$99.99
  • Lifetime Premium Membership$189.00

Questions

Is Convert by Neutrium free?
Convert by Neutrium is free to download, with in-app purchases available.
Is Whisper free?
Whisper is free to download, with in-app purchases available.
Do Convert by Neutrium or Whisper have ads?
Neither Convert by Neutrium nor Whisper shows ads.
Which is updated more often, Convert by Neutrium or Whisper?
Convert by Neutrium ships an update every 13 months, and Whisper every 3 weeks. Most recently, Convert by Neutrium was updated on November 11, 2026 and Whisper on November 12, 2026.

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