Frequency vs SSSAS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Read full descriptionHide full description
# 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.
SSSAS
This application facilitates school safety assessments through mobile surveys. It allows authorized users to download assessment questions, submit responses, and receive automated reports for national disaster risk reduction initiatives.
- School safety self-assessment surveys
- Post-disaster damage and needs assessment
- Downloadable survey questions
- Submit responses via mobile
- Automated report generation
- Contribute to national databases
Read full descriptionHide full description
School Safety Self Assessment Survey is a joint effort of Risk RED and IMAGINS, partnering with Save the Children, and the Global Alliance for Disaster Risk Reduction and Resilience in the Education Sector. It provides mobile applications that are part of the Comprehensive School Safety Assessment Suite. Nationally adapted surveys are developed for 1) School Safety Self-Assessment and 2) Post-Disaster Damage and Needs Assessment. School management committees, designated focal points, and other authorized enumerators can download latest survey questions, submit responses, receive automated reports, and contribute to database systems managed by their national education authorities or partners. Current installations serve Lao PDR, Fiji, China, the Philippines, Solomon Islands and Tonga.
Screenshots
Verdict
The clearest difference is rating: SSSAS at 5.0 against Frequency's 3.9. SSSAS also leads on in-app purchases (none vs 10) and iOS requirement (13.0 vs 16.0). Frequency's advantage is ratings volume (24 vs 1) and update cadence (every 10 days vs every 4 weeks). On price, 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
Both are free to download. Frequency sells 9 in-app purchases, starting at $7.99 per 7 days. SSSAS asks for nothing beyond the download.
SSSAS holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Frequency has 24 ratings behind it against 1, so its average is the more settled of the two.
Frequency ships an update every 10 days, SSSAS every 4 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.
| Parameter | Frequency | SSSAS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (24 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 24 — better | 1 |
| Update frequency | Every 10 days — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Optimize IT | Interactive Media and Geographic Information Systems, Inc. |
Customer experience
Frequency
SSSAS
In-app purchases
Frequency
- Weekly Premium$7.997 Days
- Weekly7 Days trial$9.997 Days
- Weekly VIP3 Days trial$9.997 Days
Show 6 moreShow fewer
- 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
SSSAS
No in-app purchases









