Filters vs Chrono Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Filters
This application assists in calculating electronic filter components for speaker systems. It automatically determines inductor and capacitor values based on desired impedance and cutoff frequency, and designs circuits for various speaker types. Users can visualize frequency and phase diagrams for their custom speaker designs.
- Automatic electronic component calculation
- Frequency and phase diagram display (Bode plots)
- Electronic circuit schema display
- Support for various speaker types (high, mid, low, sub)
- First and second-order filter design
- Complete filter theory and formulas
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"Filters" is an application for the calculation of electronic filters for the construction of speaker systems. The program automatically calculates the values of electronic components (inductors, capacitors) of electronic filters depending by the desired speaker impedance and the cutoff frequency. The software can calculate and design the circuits (filters) for high, medium, low, sub woofer, etc... first and second order. Once calculated the filter’s circuit the app will automatically design for You the frequency and phase diagrams (Bode plots). Build the speakers of your dreams with "Filters"! Features: - Automatic calculation of the electronic components of the filters for high, medium, low, sub woofers etc... - Display of frequency and phase diagrams (Bode plots) for the calculated values of the circuit’s electronic components - Display electronic circuit’s schema (filter) - Complete theory for formulas/circuits for all the filters implemented in "Filters"
Chrono Plus
This app helps freelancers and hourly professionals manage tasks, track work hours, and calculate costs. It offers features for task creation, time and cost tracking, and invoice generation, with cross-device synchronization. Visualize project progress with graphs and charts.
- Task and subtask creation
- Time and cost tracking
- Multiple hourly rates
- Built-in invoice generator
- Project visualization
- Cross-device synchronization
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Chrono Plus is a convenient task manager and time tracking tool with a host of handy features. A must-have for any freelancer or professional paid by the hour, it features a sleek, intuitive interface for management of tasks, cost calculation and invoicing. Also available for Mac, Chrono Plus keeps all data in sync across computers and mobile devices. Key Features: • Easy and fast creation of tasks and subtasks • Color marking and search for better navigation • Tracks completion of tasks and projects • Time and cost tracking • Multiple hourly rates • Built-in invoice generator (formatted in MS Excel) • Ability to e-mail invoices to clients or save them to external applications • Project visualization using graphs and charts • Full synchronization between iPhone, iPad and Mac • Mac version is also available * Sync with Mac requires Chrono Plus Pro for macOS, sold separately.
Screenshots
Verdict
The clearest difference is review sentiment: Chrono Plus at 72% against Filters's 0%. Chrono Plus also leads on price (Free vs $0.99) and rating (4.1 vs 3.0). Filters's advantage is in-app purchases (none vs 1) and ads (none vs shown).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Chrono Plus is free to download; Filters costs $0.99 up front. Chrono Plus sells 1 one-off in-app purchase. Filters asks for nothing beyond the download.
Chrono Plus holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: Chrono Plus has 75 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Filters's written reviews are positive against 72% of Chrono Plus's.
Filters ships an update every 40 months, Chrono Plus every 14 months. The most recent releases landed on September 7, 2026 and August 18, 2026 respectively.
| Parameter | Filters | Chrono Plus |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.0 (1 ratings) | 4.1 (75 ratings) — better |
| Positive reviews | 0.0% of reviews | 71.6% of reviews — better |
| Number of ratings | 1 | 75 — better |
| Update frequency | Every 40 months | Every 14 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Gianluca Natalini | Denys Ievenko |
Customer experience
Filters
Chrono Plus
Bugs and requests
Filters
Not enough reviews yet to summarise bugs or requests.
Chrono Plus
Reported bugs
25 issues- Won't sync
- Can't log in
- Ads showing in paid app
- App stopped syncing between devices
- Lost hours of work
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- Invoice feature broken
- Invoice lacks client information
- Invoice is left blank
- Developer has never responded
- Does not allow entering future dates and hours
- Invoice has no option to put dates
- Dragging projects around needs to be improved
- Clunky to add time retroactively
- Cannot edit details about task in mobile version
- All data disappeared
- Crashing on iPhone
- Developer suggestions unhelpful
- Wiped local data when creating sync account
- App opens only to disappear
- Will not upload, print or transfer a report
- Invoice must be customized outside of the app
- Cannot manually edit hours recorded incorrectly
- Sync account on iOS deleted data from OS X version
- Cannot manually change or add time to tasks
- App won't even launch
Requested features
28 requests- Dark mode
- Ability to move projects into folders
- Allow system font usage and bold fonts
- Produce invoice for entire project/folder
- Produce invoices for specific periods
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- Apple Watch app
- More refined data output for desktop
- Ability to enter future dates and hours
- Website with directions/documentation
- Option to put dates on invoices
- Direct iCloud sync
- Better reporting
- Ability to move projects around more easily
- More in-depth invoicing functionality
- Record time on multiple tasks simultaneously
- Write notes/comments on each task/time section
- Ability to comment on each time section
- Segment reports by day, week, month on iPhone
- Start a fresh new timeframe by day, week, and month
- Capture time entries after the fact
- Ability to change font size
- Full Excel export
- Add comment/notes to time entries
- Export times on selected jobs rather than rounded up
- More specific reports
- Ability to reposition tasks and folders
- Due date element with calendar sync
- WBS structure numbers for tasks
In-app purchases
Filters
No in-app purchases
Chrono Plus
- Unlock Pro Features$4.99
Questions
Is Filters free?
Is Chrono Plus free?
Which has better reviews, Filters or Chrono Plus?
Do Filters or Chrono Plus have ads?
Which is updated more often, Filters or Chrono Plus?
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