Comparison

RD Chess Timer vs Flag

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

Head to head
About

RD Chess Timer

Features
Read full description

Chess Timer is a simple and elegant chess clock designed for players of all levels. Whether you’re playing a casual game with friends or a competitive tournament, this app helps you keep track of time easily and accurately.

About

Flag

Features
Read full description

A real chess clock, built for real chess players. Most apps stop at Fischer, swap your color every turn, and put Bronstein behind a paywall. Flag does all of it, without a subscription. FIVE INCREMENT MODES • Fischer — increment added after every move. OTB and online standard. • Delay (USCF) — clock pauses for a fixed delay before counting down. • Bronstein — used time returned at end of move, capped at the increment. • Hourglass — time flows from one side to the other. • Byo-yomi — Japanese overtime periods after main time runs out. DISPLAY & TAP • Split or Color display modes. • Tap your own half (chess tradition) or tap anywhere — your choice. • Persistent White/Black sides — they don't swap based on turn. ALSO IN FLAG • Full game history with per-move timing • Stats dashboard — averages, move-time charts, time-trouble heatmap • Pause, resign, agree-draw shortcuts • Customizable haptics and sounds • Custom time-control presets — bullet, blitz, rapid, classical, byo-yomi PRO — ONE-TIME UNLOCK. NO SUBSCRIPTION. 7-day trial of every Pro feature. After that, a one-time unlock keeps everything forever. No subscription. No ads. Pay once, own it. Pro adds Bronstein, Hourglass, and Byo-yomi modes; 12+ premium clock themes (Wood, Tournament felt, Brass DGT, Carrara Marble, Library, Fischer 72, Havana, Zen, Frost, Streamer, Neon and more); unlimited custom presets; and premium switch sounds. PRIVACY Privacy: https://bountyapps.com/flag/privacy.html Terms: https://bountyapps.com/flag/terms.html

Screenshots

RD Chess Timer4 screens
Flag4 screens

Verdict

The call

The clearest difference is in-app purchases: RD Chess Timer at none against Flag's 1. Flag's advantage is update cadence (every 2 days vs every 6 days) and iOS requirement (18.6 vs 26.0). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flag sells 1 one-off in-app purchase. RD Chess Timer asks for nothing beyond the download.

UpkeepUpdate frequency

RD Chess Timer ships an update every 6 days, Flag every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 3 level
RD Chess Timer versus Flag: the parameters behind the verdict, then further details
ParameterRD Chess TimerFlag
PriceFreeFree
Update frequencyEvery 6 daysEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone
Requires iOS26.018.6 — better
Further details — not scored
Size26 MB51 MB
Age rating4+4+
DeveloperRaghul SAnton Voropaiev

In-app purchases

None

RD Chess Timer

No in-app purchases

1 purchases

Flag

One-time1
  • Flag Pro$4.99

Questions

Is RD Chess Timer free?
RD Chess Timer is free to download, with no in-app purchases.
Is Flag free?
Flag is free to download, with in-app purchases available.
Do RD Chess Timer or Flag have ads?
Neither RD Chess Timer nor Flag shows ads.
Which is updated more often, RD Chess Timer or Flag?
RD Chess Timer ships an update every 6 days, and Flag every 2 days. Most recently, RD Chess Timer was updated on November 5, 2026 and Flag on October 31, 2026.

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