KeepCount vs HydroCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeepCount
This app transforms your device into a customizable tally board for tracking anything from game scores and workouts to inventory and habits. Easily add, resize, and color-code counters, with options for undo/redo and home screen widgets for quick access. An optional Pro upgrade unlocks unlimited boards and history.
- Customizable tally boards
- Count up, down, or exact numbers
- Adjustable step values
- Undo/redo functionality
- Home screen widgets
- Siri and Shortcuts integration
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Count what matters, one tap at a time. KeepCount turns your iPhone or iPad into a colorful board of counters for game scores, workouts, attendance, inventory, knitting rows, habits, and everyday tallies. COUNT YOUR WAY • Count up, count down, or enter an exact number. • Choose a step from 1 to 100 and a starting value for each counter. • Fix mistakes with undo and redo. MAKE IT YOURS • Add, resize, and arrange counters to fit your board. • Give each counter a label and a preset or custom color. • Keep work, home, and game night separate with three free boards. KEEP COUNTS WITHIN REACH • Add an interactive board widget to your Home Screen. Tap to count; Enter Number counters open KeepCount’s keypad. • Use Siri and Shortcuts to change, check, or reset a counter. • On iPhone Duo, use the inner or outer display. Partially folded tabletop mode puts the whole board above the fold and matching controls below; flat mode keeps the usual board. KeepCount Pro Upgrade for unlimited boards, full activity history, and an ad-free interface. Review count changes, resets, and edits; rapid taps may be grouped into one history entry. Monthly and yearly subscription options are available. Counting works offline. Your boards, counter values, and activity history are stored locally on your device. Purchases, restoring Pro, and some connected services require internet access. See our privacy policy for information about purchases, analytics, ads, and crash diagnostics. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://keepcount.app/privacy
HydroCalc
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HydroCalc is a calculation aid for heating and HVAC technicians. Calculate flow from heat output and temperature difference alongside the existing hydraulic calculators. CIRCUIT PROJECTS Create named projects and group circuits by room, category or floor. Record heat output, temperature difference and input sources for each circuit. View total heat output and required flow together. BASELINE AND COMPARISON Capture a fixed baseline and edit later proposals independently. Review differences in totals and share a calculation worksheet with inputs, sources and comparison. German and English. Local projects and calculations work offline. Existing purchase unlocks remain available. Professional calculation aid: manufacturer data, applicable rules, system design and actual measurements take precedence. Check results against the real installation. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ COMMISSIONING VISITS Record measured flow for each circuit and compare it with the design targets frozen when the visit is saved. An adjustable project tolerance makes deviations clear. Earlier visits remain unchanged after later design edits. Calculated targets and measured values stay separate.
Screenshots
Verdict
The clearest difference is update cadence: KeepCount at every 10 days against HydroCalc's every 5 weeks. 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
Both are free to download. KeepCount sells 2 in-app purchases, starting at $1.99 per month and HydroCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
KeepCount ships an update every 10 days, HydroCalc every 5 weeks. The most recent releases landed on November 9, 2026 and November 6, 2026 respectively.
| Parameter | KeepCount | HydroCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 10 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | 1881 Digital, LLC | Piotr Kaminski |
In-app purchases
KeepCount
- KeepCount Pro Monthly$1.991 Month
- KeepCount Pro Annual$19.991 Year
HydroCalc
- HydroCalc Pro$3.99









