Comparison

ChangeDay vs Battery Inventory

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ChangeDay

Features
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ChangeDay helps people with Type 1 Diabetes and their caregivers remember when insulin infusion sites, CGMs, and pump batteries were last changed, and when they are due next. Built for simple shared routines, ChangeDay keeps the focus on the three things you need to check quickly: your site, your sensor, and your pump battery. Log a change in one tap, see the next due day, and optionally share the same tracker with a caregiver or family member using Apple’s CloudKit Sharing. Whether you are tracking your own routine or helping someone else stay organized, ChangeDay is designed to be calm, private, and easy to use. Key features: • Track insulin infusion site changes • Track glucose sensor change days • Track insulin pump battery changes • See last changed and next due dates at a glance • Log site, sensor, or pump battery changes in one tap • View upcoming change days on a simple calendar • Review change history • Set local reminders for due dates • Share one tracker with another person using iCloud/CloudKit Sharing • Keep data stored locally and in your personal iCloud account • No account, ads, or subscription ChangeDay is intentionally simple. It is not a blood glucose tracker, dosing calculator, medication manager, or diabetes treatment app. It does not provide medical advice, dosing guidance, diagnosis, treatment recommendations, or emergency alerts. Always follow guidance from your clinician and the instructions from your device manufacturer.

About

Battery Inventory

Features
Read full description

Never wonder if you have enough battery power again. Battery Inventory helps you organize every cordless power tool battery, charger and tool in one place. Instantly see what's charged, what's charging, what's installed, and what's missing. Whether you're a DIY enthusiast, gardener, contractor or workshop owner, you'll always know if you're ready before starting your next job. Everything in one place • Organize all your battery packs • Track charge levels and battery health • Assign batteries to tools • Manage chargers and charging slots • Record purchase dates, notes and photos • Keep your entire battery collection organized Plan your next job with confidence Battery Inventory goes beyond simple inventory. Create a job with the tools you'll use, and Battery Inventory automatically tells you: • Whether you have enough charged batteries • Which batteries need charging • When charging should begin • Which charger to use • Whether every tool will be ready on time No more discovering empty batteries halfway through a project. Smarter charging • Live charging progress • Estimated time until fully charged • Charge completion notifications (Pro) • Quick charge updates using percentages or battery LED indicators Find any battery instantly • Generate QR codes for every battery • Print battery labels • Scan a QR code to instantly open a battery • Pair NFC tags for one-tap identification • Powerful search across your inventory • Organize batteries by brand Know where every battery is Track every battery as: • Available • Installed in a tool • Charging • Borrowed • Missing • Retired Privacy first Battery Inventory was built with privacy in mind. • No account required • Works completely offline • Your data stays on your device • No third-party analytics Battery Inventory Pro Unlock advanced features including: • Unlimited batteries • Unlimited tools • Unlimited chargers • Advanced Job Planning • Charge completion notifications Perfect for DIY enthusiasts, home workshops, contractors, electricians, carpenters, landscapers and anyone managing cordless power tool batteries. Supports batteries and tools from many popular brands, including DeWalt, Makita, Milwaukee, Bosch, Ryobi, Einhell, Parkside, Hilti, Stihl, EGO and more. Organize your cordless tool batteries, manage chargers, print labels, and always know which batteries are ready for work. Stop guessing. Stay organized. Always have enough power for the next job. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ChangeDay4 screens
Battery Inventory4 screens

Verdict

The call

The clearest difference is in-app purchases: ChangeDay at none against Battery Inventory's 2. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Battery Inventory sells 2 in-app purchases, starting at $2.99 per month. ChangeDay asks for nothing beyond the download.

Scorecard1 real difference · 5 level
ChangeDay versus Battery Inventory: the parameters behind the verdict, then further details
ParameterChangeDayBattery Inventory
PriceFreeFree
Update frequency—Every 9 days
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.617.0 — better
Further details — not scored
Size5 MB6 MB
Age rating4+4+
Developerjonathan heringTamas Bereczki

In-app purchases

None

ChangeDay

No in-app purchases

2 purchases

Battery Inventory

Subscriptions2
  • Battery Inventory Pro Monthly$2.991 Month
  • Battery Inventory Pro Yearly3 Days trial$19.991 Year

Questions

Is ChangeDay free?
ChangeDay is free to download, with no in-app purchases.
Is Battery Inventory free?
Battery Inventory is free to download, with in-app purchases available.
Do ChangeDay or Battery Inventory have ads?
Neither ChangeDay nor Battery Inventory shows ads.

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