Comparison

Vowel Practice vs NTRIP STX

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

Head to head
About

Vowel Practice

Analyze spoken vowels by calculating and plotting their formant frequencies. Speak a word with a single vowel to see its graphical representation on a standard vowel diagram, with an indicator light showing the application's status. Useful for speech therapy, language learning, and research.

Highlights
  • Calculates formant frequencies
  • Plots vowel locations on a diagram
  • Analyzes spoken vowels
  • Indicator light for status
  • Assists speech therapy
  • Supports language learning
Features
Read full description

This application calculates and plots the formant frequencies of spoken vowels. The user should speak a word containing a single vowel, and we will analyze and show results. First two formant frequencies are used to graphically show the location of spoken vowel on a standard vowel diagram. An indicator light changes its color to display the status of the application. This is made to assist with speech therapy and language learning as well as other research topics.

About

NTRIP STX

Features
Read full description

NTRIP STX is a Ntrip client, capable of delivering RTK corrections to connected Stonex GNSS receivers to provide centimeter accuracy. You can then connect other mapping and surveying apps to these receivers for precise data collection and stakeout. NTRIP STX includes a world-wide database of available Ntrip casters. Free subscription: - Run the Ntrip connection for 10 minutes per day - Free 7 days trial of all “Professional" subscription features Paid "Professional" subscription: - no time limits on connection to Ntrip caster Purchase of a NTRIP STX subscription allows you to run the NTRIP STX App on all supported platforms. Subscription payments will be charged to your iTunes Account at confirmation of purchase and will automatically renew unless you cancel your subscription or turn off auto-renewal at least 24-hours prior to the end of the current subscription period. A cancelled subscription remains active until the end of the current period, at which time your account reverts to the “Free" subscription functionality. Customers selecting the Free Trial will enjoy “Professional" subscription features for a period of 7 days, after which they can elect to purchase a paid subscription. In the absence of a purchase, their account will revert to “Free" subscription functionality. For further information: • NTRIP STX Privacy Policy: https://its-geo.eu/Privacy.html • NTRIP STX Terms of Use: https://its-geo.eu/terms-of-service.html

Screenshots

Vowel Practice3 screens
NTRIP STX4 screens

Verdict

The call

The clearest difference is price: NTRIP STX at Free against Vowel Practice's $7.99. NTRIP STX also leads on iOS requirement (15.0 vs 26.0). Vowel Practice's advantage is in-app purchases (none vs 2) and update cadence (every 4 months vs every 10 months). 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

NTRIP STX is free to download; Vowel Practice costs $7.99 up front. NTRIP STX sells 2 in-app purchases, starting at $4.49 per month. Vowel Practice asks for nothing beyond the download.

UpkeepUpdate frequency

Vowel Practice ships an update every 4 months, NTRIP STX every 10 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

Scorecard4 real differences · 4 level
Vowel Practice versus NTRIP STX: the parameters behind the verdict, then further details
ParameterVowel PracticeNTRIP STX
Price$7.99Free — better
Positive reviews20.0% of reviews—
Update frequencyEvery 4 months — betterEvery 10 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.015.0 — better
Further details — not scored
Size1 MB109 MB
Age rating4+4+
DeveloperWilliam EntrikenITS Geo Solutions GmbH

In-app purchases

None

Vowel Practice

No in-app purchases

2 purchases

NTRIP STX

Subscriptions2
  • Professional - Monthly$4.491 Month
  • Professional - Annual$46.991 Year

Questions

Is Vowel Practice free?
Vowel Practice costs $7.99, with no in-app purchases.
Is NTRIP STX free?
NTRIP STX is free to download, with in-app purchases available.
Do Vowel Practice or NTRIP STX have ads?
Neither Vowel Practice nor NTRIP STX shows ads.
Which is updated more often, Vowel Practice or NTRIP STX?
Vowel Practice ships an update every 4 months, and NTRIP STX every 10 months. Most recently, Vowel Practice was updated on October 10, 2026 and NTRIP STX on October 4, 2026.

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