Comparison

Daysium vs BACKI

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

Head to head
About

Daysium

Features
Read full description

Daysium is a day counting and tax residency evidence platform for globally mobile individuals. The app elegantly resolves the risks and complexities of day counting and record-keeping. Key Daysium Features: - Automated Location Logging: Your phone's GPS captures location data automatically, minimising the risk of gaps in your record. - Photographic Evidence: Upload geo-tagged photos to build an auditable record of your presence in each jurisdiction. - Multi-Jurisdiction Tax Rules: See your day count and status against each country's coded tax residency rules, wherever your travel takes you. - Strategic Planning: Model future travel against the rules, so you can see the impact on your day counts before you go. - No More Spreadsheets: Replace manual day counting with a single, reliable platform. Managing tax residence across multiple jurisdictions is complex, and one miscounted day can carry significant financial consequences. Daysium gives you the precision and the record to demonstrate reasonable care, without the manual effort. Daysium brings together rule establishment, planning, day counting and evidencing in one place — built for the complexity of modern, globally mobile lives. Follow us on LinkedIn: https://www.linkedin.com/company/daysium/

About

BACKI

Features
Read full description

BACKI helps you keep track of work expenses you paid personally until the money comes back. SEE WHAT YOU ARE OWED • See the total your employer still owes you • Separate submitted, approved and overdue amounts • Monitor how long expenses have been outstanding FOLLOW EVERY CLAIM • Record expenses manually in seconds • Move each claim from paid to submitted, approved, due or overdue • Record partial repayments without losing the original expense history • Keep fully reimbursed expenses in a searchable history KEEP THE DETAILS TOGETHER • Add an employer, category, claim reference and notes • Search expenses by description, employer or claim • Use one base currency across your records PRIVATE BY DESIGN BACKI needs no account or bank connection. Expenses and receipts are stored locally on your iPhone. The app includes no advertising or tracking. BACKI is free for up to 10 outstanding expenses, with full Home and History, search, and partial or full repayment tracking. BACKI Full is an optional Ā£4.99 one-time purchase that unlocks unlimited outstanding expenses, receipt images and PDFs, CSV export, custom categories and advanced History filters. No subscription. Keep track until you get it back.

Screenshots

Daysium4 screens
BACKI4 screens

Verdict

The call

The clearest difference is in-app purchases: Daysium at none against BACKI's 1. Daysium also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. BACKI sells 1 one-off in-app purchase. Daysium asks for nothing beyond the download.

Scorecard3 real differences Ā· 3 level
Daysium versus BACKI: the parameters behind the verdict, then further details
ParameterDaysiumBACKI
PriceFreeFree
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size74 MB1 MB
Age rating4+4+
DeveloperDaysiumWai Hung Chiu

In-app purchases

None

Daysium

No in-app purchases

1 purchases

BACKI

One-time1
  • BACKI Full$4.99

Questions

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

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