Comparison

IOU vs Citizen Calculator Lite

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

Head to head
About

IOU

Easily track money lent, borrowed, and owed without spreadsheets. Manage personal debts, shared expenses, and recurring bills with clear overviews of balances and payment history. Log payments instantly and stay organized with automatic tracking for monthly charges.

Highlights
  • Track money lent, borrowed, and owed
  • Filter debts owed to you vs. money you owe
  • View balances, payment history, and upcoming charges
  • Log partial or full payments instantly
  • Automatically track recurring bills and subscriptions
  • Private and ad-free financial tracking
Features
Read full description

OweTracker is a simple personal debt tracker for money you lend, borrow, and owe — without spreadsheets or guesswork. Track rent, shared expenses, personal loans, IOUs, recurring bills, and everyday paybacks in one clear place. See what's owed, what's paid, what's coming next, and when it's time to settle up. Track personal debts with clarity Filter between money you owe and money owed to you with a single tap See totals, payment history, and remaining balances at a glance Save with confidence — the button tells you exactly what you're saving Add notes to keep context on every entry Built for recurring payments Track recurring charges like rent, phone bills, subscriptions, or ongoing loans Set charges to repeat weekly, every two weeks, or monthly Schedule future recurring charges before a balance is due See upcoming charges before they happen Stay organized even when payments change over time Record payments easily Log partial or full payments in seconds Watch balances update instantly Never lose track of who paid what Settle up clearly Create simple settle-up cards when it's time to close the loop Share clean payment summaries for rent, bills, loans, or everyday paybacks Help everyone see what was owed, what was paid, and what remains Made for wherever you are Works in 150+ currencies Available in 12 languages Private by design No ads No data selling Your financial tracking stays on your device Upgrade to Pro OweTracker includes a free version with basic tracking and settle-up cards. Upgrade to Pro to unlock: Unlimited debts Unlimited recurring charges Custom quick notes for faster entry Subscriptions help support continued development and keep OweTracker private and ad-free. If you've ever said "I'll remember later" — OweTracker is for you. Privacy Policy: https://sites.google.com/view/owetracker-privacy-policy/home Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Citizen Calculator Lite

Features
Read full description

Citizen Calculator is a precision-built iPhone calculator that works exactly like a real Citizen desktop calculato, not a simplified phone calculator, but a complete professional tool you can rely on every day. # Five keypad layouts Each layout arrives with its own signature theme, so the calculator looks cohesive the moment you switch. # Twelve themes Citizen Classic, Desk Silver, Desk Carbon, Midnight Pro, Neon Night, Ocean Depth, Rose Quartz, Royal Gold, Retro LCD, Forest, Sunset Glass, and Minimal Light. Every theme applies a complete visual makeove, background, display, all key colours, shadows, and glow effects. # Real calculator logic Operations run left to right as you type. Press 2 + 3 x 4 and get 20, not 14 — exactly like a physical desk calculator. Constant equals lets you repeat the last operation by pressing = again. Every calculation is done in pure decimal math, so 0.1 + 0.2 gives 0.3, never a floating-point surprise. # Built-in GST calculator Add or remove GST at rates of 3%, 5%, 12%, 18%, and 28% with a single key. Switch rates instantly from the display chip without opening settings. Perfect for shopkeepers, accountants, freelancers, and anyone who works with Indian GST every day. # Choose the layout that matches how you work: - Citizen Pro: the standard desktop arrangement with all functions at hand - Citizen Desk: the classic desk layout with a tall equals key and separate function column - GST Pro: dedicated GST keys front and centre for tax-heavy workflows - Plus: a wide-format layout optimised for adding long columns of numbers # Professional calculator functions - Memory: M+, M-, MR, and MC. M+ and M- complete any pending operation before storing, just like a real Citizen. - Grand Total (GT): every equals result is automatically accumulated. Press GT to recall, press GT twice to clear. - Markup (MU): calculate the selling price for a target gross margin in one step. - Percent: completes with the pending operator — 200 + 10% gives 220. - Square Root: keeps the pending operator active, so 9 + sqrt 16 = gives 13. - Swipe left or right on the display to delete the last digit. - Long-press AC to reset everything including memory and grand total. # Physical key feel Every key press and release has a distinct haptic tick tuned to its role — light for numbers, firm for operators, rigid for equals. An optional key-click sound plays on every press. Keys animate with a press-and-bounce to feel like real physical switches. # Number formats Switch between international formatting (1,234,567) and Indian formatting (12,34,567) in settings. The display updates instantly. # Calculation history Every completed calculation is saved automatically. Tap any entry to load the result straight back to the display. History is preserved between app launches. # Privacy No account required. No analytics. No ads. All data — history, memory, total — is stored only on your device.

Screenshots

IOU4 screens
Citizen Calculator Lite4 screens

Verdict

The call

The clearest difference is in-app purchases: Citizen Calculator Lite at none against IOU's 3. IOU's advantage is update cadence (every 2 weeks vs every 5 weeks). 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. IOU sells 3 in-app purchases, starting at $1.99 per month. Citizen Calculator Lite asks for nothing beyond the download.

UpkeepUpdate frequency

IOU ships an update every 2 weeks, Citizen Calculator Lite every 5 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
IOU versus Citizen Calculator Lite: the parameters behind the verdict, then further details
ParameterIOUCitizen Calculator Lite
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18
Further details — not scored
Size13 MB2 MB
Age rating4+4+
DeveloperMASON QULIZADAGadhiya Bhavnaben

In-app purchases

3 purchases

IOU

Subscriptions2
  • OweTracker Pro – Monthly$1.991 Month
  • OweTracker Pro$17.991 Year
One-time1
  • OweTracker Pro – Lifetime$19.99
None

Citizen Calculator Lite

No in-app purchases

Questions

Is IOU free?
IOU is free to download, with in-app purchases available.
Is Citizen Calculator Lite free?
Citizen Calculator Lite is free to download, with no in-app purchases.
Do IOU or Citizen Calculator Lite have ads?
Neither IOU nor Citizen Calculator Lite shows ads.
Which is updated more often, IOU or Citizen Calculator Lite?
IOU ships an update every 2 weeks, and Citizen Calculator Lite every 5 weeks. Most recently, IOU was updated on November 5, 2026 and Citizen Calculator Lite on October 31, 2026.

Other comparisons