HPI vs Frequency
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HPI
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Als junge und dynamische Hausverwaltung sind wir immer bestrebt unseren Kunden das beste Service zu bieten – und das ab sofort auch digital! Profitieren Sie von der HPI App und melden Sie uns Ihre Anliegen und Schäden rund um die Uhr bequem über die HPI App. Zusätzlich können Sie einfach über Ihr Smartphone oder Tablet wichtige Dokumente digital abrufen, jederzeit einsehen und wichtige Informationen rund um die Immobilie via Push-Nachricht direkt auf Ihr Handy erhalten. So sind Sie jederzeit über Ihre Liegenschaft bestens informiert - unabhängig vom Ort Ihres Aufenthalts. Ihr digitaler HOLLE & PARTNER Kundenservice zusammengefasst: o HOCHMODERN: Online Meldung von Schadensmeldungen rund um die Uhr über das Smartphone oder Tablet o ORGANISIERT: Einsicht in wichtige Dokumente zur Liegenschaft o LEBENSWERT: Wichtige Informationen über Ihre Liegenschaft direkt über das schwarze Brett o LEISTUNGSFÄHIG: Status-Updates zu Ihren Schadensmeldungen und laufende Rückmeldungen o ENGAGIERT: Beantwortung häufig gestellter Fragen
Frequency
Generate precise audio frequencies for various purposes, from tuning instruments to cleaning water from speakers. Explore different waveforms and customize sound generation for unique audio experiences. Elevate your audio quality and functionality.
- Generate frequencies from 1 Hz to 40,000 Hz
- Clean water/moisture from speakers
- Produce sine, triangle, sawtooth, and square waveforms
- Tune musical instruments
- Select notes and octaves for specific pitches
- Play multiple frequencies simultaneously
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# GENERATE ANY TONE, FROM 1 HZ TO 40 KHZ Frequency is a tone generator. Set a pitch by hertz or by note and octave, choose a waveform, and play it. It also plays the low sweep that pushes water out of a blocked speaker. # PLAY A TONE AT ANY FREQUENCY Enter a value in hertz, or pick a note and an octave and let the app work it out. The range runs from 1 Hz to 40,000 Hz, past the top of human hearing. # CHOOSE YOUR WAVEFORM Sine, triangle, sawtooth, and square. Each has its own character, and switching between them at the same pitch is the quickest way to hear the difference. # PLAY SEVERAL TONES AT ONCE Run more than one tone together, each with its own frequency, waveform, and volume, and listen to how they interact. # CLEAN YOUR SPEAKER Water trapped in a speaker muffles it. Playing a low-frequency tone at full volume vibrates the driver and pushes the water out — the same technique a smartwatch uses to eject water after a swim. # A REFERENCE PITCH TO TUNE AGAINST Play a note at a known frequency and tune your instrument to it by ear. Frequency plays the reference; it does not listen, so nothing you play reaches the app. # TUTORIALS INCLUDED Step-by-step guides for generating tones, working with waveforms, running several at once, and cleaning a speaker. # SUBSCRIPTIONS AND AUTOMATIC RENEWAL - Your subscription includes access to the features listed above. - Payment will be charged to your Apple ID Account at confirmation of purchase. - Subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current period. - Your account will be charged for renewal within 24 hours prior to the end of your selected subscription period. - Subscriptions can be managed and auto-renewal turned off in your App Store Account Settings. # LEGAL Terms of Service: https://cooptimizeit.com/terms-of-service Privacy Policy: https://cooptimizeit.com/privacy-policy # SUPPORT Contact us at info@cooptimizeit.com. We reply within 48 hours.
Screenshots
Verdict
The clearest difference is in-app purchases: HPI at none against Frequency's 10. Frequency's advantage is update cadence (every 10 days vs every 2 months). On price, ads, device support and iOS requirement 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
Both are free to download. Frequency sells 9 in-app purchases, starting at $7.99 per 7 days. HPI asks for nothing beyond the download.
HPI ships an update every 2 months, Frequency every 10 days. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.
| Parameter | HPI | Frequency |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.9 (24 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 24 — better |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 46 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Idwell GmbH | Optimize IT |
In-app purchases
HPI
No in-app purchases
Frequency
- Weekly Premium$7.997 Days
- Weekly7 Days trial$9.997 Days
- Weekly VIP3 Days trial$9.997 Days
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- Monthly Premium$17.991 Month
- Monthly7 Days trial$19.991 Month
- Annual VIP$24.991 Year
- Annual Premium$24.991 Year
- Annual VIP3 Days trial2 variants$29.991 Year
- Annual7 Days trial$29.991 Year
Questions
Is HPI free?
Is Frequency free?
Do HPI or Frequency have ads?
Which is updated more often, HPI or Frequency?
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