HeatSiecker vs Calf Keeper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HeatSiecker
This app connects to a wearable patch on cows to monitor mounting activity. It provides real-time data on heat cycles, helping farmers determine the optimal time for breeding. Users can scan patches, pair them with cow IDs, create breeding groups, and receive text updates.
- Monitor mounting activity
- Accurate time and date of activity
- Scan patch and pair with ID
- Create breeding groups
- Receive text updates
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The purpose of the HeatSiecker mobile app is to work with the HeatSiecker patch. The app connects with the patch on your cows, providing you with current mounting activity. Whether you are working in the field, on the road, or at your kid’s ballgame, you will always be connected to the cows you are breeding. Now you will know what cow is in heat and what the best time to breed each one is. The useful features: · Accurate time and date of each mounting activity is displayed. · Ability to scan patch and pair with ID tag of cow. · Create breeding groups. · Ability to receive text updates on activity of individual cows.
Calf Keeper
This app helps livestock owners manage their herds by tracking calf births, linking animals, and calculating calving dates. Premium features allow for custom data fields, animal scoring, photo uploads, and collaborative herd management.
- Calf birth tracking
- Herd linking (cows, bulls)
- Gestation calculator
- Customizable data fields
- Animal scoring
- Photo uploads
- Collaborative herd management
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Calf Keeper is a calving book designed to be simple, easy to use, and customizable. Users can track data about calves as they're born and also link the calves to cows and bulls in their cattle herd. A gestation calculator is also provided to calculate approximate calving dates. By upgrading to Calf Keeper PLUS, users can customize their data entry. New fields can be added to allow you to track the data that is important to your operation. Users can also track customizable scores to help build a better picture of the quality of an animal. PRO users can add up to 10 photos per animal and also invite other users to manage their herd. When changes are made by other users, you can receive a notification to stay up to date with the latest status of your herd. Before purchasing a subscription, try a free 30-day trial to see if Calf Keeper is right for your operation. Calf Keeper is powered by Cattle Market Mobile. Terms of Service: https://www.calfkeeper.com/legal/terms
Screenshots
Verdict
The clearest difference is in-app purchases: HeatSiecker at none against Calf Keeper's 4. Calf Keeper's advantage is update cadence (every 2 weeks vs every 2 months) and rating (4.2 vs 4.0). 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. Calf Keeper sells 4 in-app purchases, starting at $5.99 per month. HeatSiecker asks for nothing beyond the download.
Calf Keeper holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Calf Keeper has 5 ratings behind it against 1, so its average is the more settled of the two.
HeatSiecker ships an update every 2 months, Calf Keeper every 2 weeks. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.
| Parameter | HeatSiecker | Calf Keeper |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 35 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Brent Sieck | CattleSync, LLC |
Customer experience
HeatSiecker
Calf Keeper
In-app purchases
HeatSiecker
No in-app purchases
Calf Keeper
- Calf Keeper Plus (Monthly)1 Month trial$5.991 Month
- Calf Keeper Pro (Monthly)1 Month trial$9.991 Month
- Calf Keeper Plus (Yearly)1 Month trial$59.991 Year
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- Calf Keeper Pro (Yearly)1 Month trial$99.991 Year
Questions
Is HeatSiecker free?
Is Calf Keeper free?
Which has better reviews, HeatSiecker or Calf Keeper?
Do HeatSiecker or Calf Keeper have ads?
Which is updated more often, HeatSiecker or Calf Keeper?
Other comparisons
